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Caitlyn LoL Patch HistoryPC

Caitlyn

Marksman

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Caitlyn was last nerfed in Patch 26.1 (). Across 98 patches, Caitlyn has received 33 buffs, 19 nerfs, 45 adjustments since release in Patch 1.0.0.108.

Abilities
HeadshotPC
Passive - Headshot

Innate: Caitlyn's basic attacks generate a stack of Count on-attack, doubled if she is within brush. At 5 stacks, or 4 while in brush, her next basic attack consumes all stacks on-attack to become a Headshot.

Headshot: Caitlyn's basic attack is empowered to have an uncancellable windup and deal 60% / 80% / 100% (+ 0 to 100) AD bonus physical damage, increased to 110% (+ 0 to 100) AD against non-champions.

Enemies that step over a Yordle Snap Trap or are hit by 90 Caliber Net can grant an additional Headshot against them at 1300 range within 1.8 seconds, without consuming stacks. Each method grants only one Headshot at a time.

Piltover PeacemakerPC
Q - Piltover Peacemaker
Cost: 55 / 60 / 65 / 70 / 75 mana
CD: 10 / 9 / 8 / 7 / 6
Cast Time: 0.625
Range: 1300 / 1240

Active: Caitlyn fires a piercing shot in the target direction that deals physical damage to the first enemy it passes through, after which it expands in width but deals only 60% damage to enemies it hits thereafter.

Physical Damage: 50 / 90 / 130 / 170 / 210 (+ 125 / 145 / 165 / 185 / 205% AD)
Reduced Damage: 30 / 54 / 78 / 102 / 126 (+ 75 / 87 / 99 / 111 / 123% AD)

Enemies true sight by Yordle Snap Trap always take full damage from Piltover Peacemaker.

Yordle Snap TrapPC
W - Yordle Snap Trap
Cost: 20 Mana + 1 Charge
CD: 0.5
Cast Time: 0.25
Range: 800

Active: Caitlyn sets a visible trap at the target location that is untargetable and arms after 1 second, lasting for a duration. The trap grants sight of the area for 1 second after being placed.

Trap Duration: 30 / 35 / 40 / 45 / 50 seconds
Maximum Number of Traps: 3
Headshot Damage Increase: 35 / 80 / 125 / 170 / 215 (+ 30% bonus AD)

Caitlyn periodically stocks a Yordle Snap Trap charge, up to a maximum amount. Deploying traps beyond the maximum destroys the oldest one.

The next enemy champion that springs the trap is root for 1.5 seconds and true sight for 3 seconds, as well as takes additional damage from the Headshot granted by this ability. Trapped targets become immune to further Yordle Snap Traps for 3 seconds, preventing them from springing subsequent traps for the duration.

90 Caliber NetPC
E - 90 Caliber Net
Cost: 75 mana
CD: 16 / 14 / 12 / 10 / 8
Cast Time: 0.15
Range: 800 / 740
Effect Radius: 140

Active: Caitlyn fires a net in the target direction and dash 390 units in the opposite direction. The net deals magic damage to the first enemy hit and slow them by 50% for 1 second.

Magic Damage: 80 / 130 / 180 / 230 / 280 (+ 80% AP)

Caitlyn will not recoil after the cast time if she was immobilize or ground during it. She can cast any of her abilities during the recoil dash.

Ace in the HolePC
R - Ace in the Hole
Cost: 100 mana
CD: 90
Cast Time: 0.375
Range: 3500

Active: Caitlyn locks onto the target enemy champion and channel for 1 second, true sight them as well as sight herself.

Physical damage: 300 / 475 / 650 (+ 100% bonus AD)

Ace in the Hole is placed on a 5-second cooldown if canceled.

Once Caitlyn completes the channel, she fires a homing bullet toward the target that deals physical damage to the first enemy champion it hits, increased by 0 to 30 .

Base Stats

Health: 580
Health Per Level: 107
Mana: 315
Mana Per Level: 40
Attack Damage: 62
AD Per Level: 3.8
Attack Speed: 0.681
AS Per Level: 4
Armor: 27
Armor Per Level: 4.7
Magic Resist: 30
MR Per Level: 1.3
Movement Speed: 325
Range: 650
Health Regen: 3.5
HP Regen Per Level: 0.55
Mana Regen: 7.4
Mana Regen Per Level: 0.7
Patch 26.1nerf

Caitlyn's top-end Headshot damage has gotten out of hand and with the value of critical strikes going up it's about to get even stronger, so we're taking a heavy swing to Headshot's top end. We're also making her R scale with Infinity Edge, as it already scales with critical strike chance, but we're reducing its damage to make room for her stronger basic attacks.

Headshot

  • Critical strike chance ratio changed to 100% of bonus critical damage from 85% of total critical damage.
  • Base scaling reduced to 0 to 100% (based on critical strike chance) from 0 to 148.75%.
  • Infinity Edge scaling reduced to 0 to 30% (based on critical strike chance) from 0 to 34%.

Ace in the Hole

  • Critical strike chance scaling reduced to 0 to 30% (based on critical strike chance) from 0 to 50%.
  • New Effect: Critical strike chance ratio for the increased damage now scales with bonus critical damage.
  • Infinity Edge scales with a ratio of 0 to 9% (based on critical strike chance).
Patch 25.23nerf

Like Ashe above, Caitlyn has also been eating up a lot of ADC pick rate. We think she should maintain her identity as a long-range lane bully, but she's also bursting champions too hard with late game Headshots, so we're bringing down the top-end damage a bit.

Headshot

  • AD ratio reduced to 60/80/100% AD from 60/90/120% AD.
  • Non-champion AD ratio reduced to 110% AD at all levels from 110/115/120% AD.
Patch 25.19buff

Caitlyn's been missing from pro play for quite some time now despite her reputation as a lane bully. As her ability casts are potent enough, we’re pushing up her basic attack power with the hope that she has a real shot at making it into some games this Worlds.

Stats

  • Base attack damage increased to 62 from 60.
Patch 25.6nerf

W headshot damage and R damage decreased.

Yordle Snap Trap

  • Headshot base bonus damage reduced to 35/80/125/170/215 from 40/85/130/175/220.
  • Bonus Headshot damage bonus AD ratio reduced to 30% bonus AD from 40%.

Ace in the Hole

  • Base damage reduced to 300/475/650 from 300/500/700.
Patch 14.24change

Arcane Enforcer

  • Renamed to Arcane Enforcer from Arcane.
Patch 14.23nerf

R damage decreased.

Ace in the Hole

  • Bonus AD ratio reduced to 100% bonus AD from 150%.
Patch 14.20buff

Attack speed ratio increased. Q secondary target damage increased.

Stats

  • Attack speed ratio increased to 0.625 from 0.61.

Piltover Peacemaker

  • Damage against secondary targets increased to 60% from 50%.
Patch 14.17buff

Attack Speed Ratio increased. W cooldown decreased.

Stats

  • Attack speed ratio increased to 0.61 from 0.594.

Yordle Snap Trap

  • Recharge reduced to 26/22/18/14/10 seconds from 30/24/19/15/12. Now scales linearly.
Patch 14.11change

Attack Speed ratio increased. W headshot damage reduced. R damage reduced.

Stats

  • Attack speed ratio increased to 0.594 from 0.568.

Yordle Snap Trap

  • Headshot bonus AD ratio reduced to 40% bonus AD at all ranks from 40/50/60/70/80%.

Ace in the Hole

  • Bonus AD ratio reduced to 150% bonus AD from 170%.
Patch 14.7change

Headshot

  • Bug Fix: A headshot gained from this ability is no longer incorrectly consumed alongside any headshots primed by Yordle Snap Trap or 90 Caliber Net.
Patch 14.3change

Headshot

  • Bug Fix: Buff is now properly consumed on-attack. She can no longer fire 2 empowered attacks by resetting her attack timer with Titanic Hydra Titanic Crescent while an empowered missile was in-flight.
Patch 13.21change

Headshot damage increased with critical strike chance. R cooldown increased, damage decreased, bonus damage with critical strike chance increased.

Headshot

  • Critical strike ratio formula changed to (100% total critical damagex85% critical strike chance) from (100% total critical damagex81.25% critical strike chance).
  • Critical strike ratio increased to 148.75 from 142.1875.

Ace in the Hole

  • Cooldown increased to 90 seconds at all ranks from 90/75/60.
  • Base damage reduced to 300/500/700 from 300/525/750.
  • AD ratio reduced to 170% bonus AD from 200%.
  • Critical strike chance ratio increased to 0 to 50% (based on critical strike chance) from 0 to 35% (based on critical strike chance).
Patch 13.18change

Headshot

  • Critical strike ratio formula changed to (100% total crit damage x 81.25% total crit chance) from (62.5% total crit damage x 130% total crit chance).
  • Damage unchanged.
Patch 13.17change

Pulsefire

  • Headshot
  • Bug Fix: Skin and chromas now properly display the headshot ready indicator VFX.
Patch 13.16nerf

Passive attacks per Headshot reduced.

Headshot

  • Number of stacks reduced to 5 from 6.
  • Critical strike ratio formula changed to (62.5% total crit damage x 130% total crit chance) from (1.25 x (0.875 + 50% bonus crit damage) x 130% crit chance).
  • Damage unchanged.
Patch 13.15buff

Passive critical strike chance scaling increased. R critical strike chance additional damage increased.

Headshot

  • Critical strike chance ratio increased to (142.1875% + Infinity Edge) critical strike chance from (131.25% + Infinity Edge).

Ace in the Hole

  • Critical strike chance ratio increased to 0 to 35% (based on critical strike chance) from 0 to 25%.
Patch 13.11change

General

  • Bug Fix: Health bar on the skins of Arcade and Prestige Arcade no longer obstructs their Recall VFX.

Ace in the Hole

  • Bug Fix: VFX is no longer misaligned from her weapon.
Patch 13.5nerf

Base armor decreased, base attack damage decreased.

Stats

  • Base attack damage reduced to 60 from 62.
  • Base armor reduced to 27 from 28.

Headshot

  • Bug Fix: Empowered basic attack no longer cancels if the basic attack was issued outside of the attack range.
Patch 13.1bbuff

Stats

  • Mana growth increased to 40 from 35.
  • Mana regeneration growth increased to 0.7 from 0.55.
Patch 12.23change

Ace in the Hole

  • Bug Fix: Now properly attacks the source if she is taunt during the effect.
Patch 12.21change

General

  • Updated ability icons.
Patch 12.16buff

Passive AD ratio increased. R now has bonus damage that scales with critical strike chance.

Headshot

  • AD ratio increased to 60/90/120% AD from 60/85/110%.
  • Non-champion AD ratio increased to 110/115/120% AD from 110% AD at all ranks.

Ace in the Hole

  • New Effect: Damage is now increased by 0 to 25% (based on critical strike chance).
Patch 12.11buff

Q AD scaling decreased early and increased late, mana cost increased early and decreased late. E base damage increased and cooldown decreased.

Piltover Peacemaker

  • AD ratio changed to 125/145/165/185/205% AD from 130/145/160/175/190% AD.
  • Mana cost changed to 55/60/65/70/75 from 50/60/70/80/90.

90 Caliber Net

  • Base damage increased to 80/130/180/230/280 from 70/110/150/190/230.
  • Cooldown reduced to 16/14/12/10/8 seconds from 16/14.5/13/11.5/10.
Patch 12.10buff

Stats

  • Base health increased to 580 from 510.
  • Health growth increased to 107 from 93.
  • Armor growth increased to 4.7 from 3.5.
  • Magic resistance growth increased to 1.3 from 0.5.
Patch 12.5change

Piltover Peacemaker

  • Bug Fix: Now properly deals damage even if the caster had a spell shield via Banshee's Veil or Edge of Night.
Patch 12.4change

Yordle Snap Trap

  • Undocumented - Estimated / Bug Fix: Casting it no longer triggers a stack of Tear of the Goddess Mana Charge.
Patch 12.3nerf

AD growth decreased. Q damage reduced.

Stats

  • Attack damage growth reduced to 3.4 from 3.8.

Piltover Peacemaker

  • Damage against secondary targets reduced to 50% from 60%.

Ace in the Hole

  • Bug Fix: Channel no longer improperly starts when fear during the cast time, thus refunding the ability's cooldown despite not being cancelled.
Patch 12.1change

Headshot

  • Bug Fix: Attacking an enemy marked by her Yordle Snap Trap or 90 Caliber Net no longer incorrectly grants Headshot stacks.

Yordle Snap Trap

  • Bug Fix: Fixed a bug where, if a champion got caught in Yordle Snap Trap at the same time as 90 Caliber Net, the extended Headshot range would get canceled.

90 Caliber Net

  • Bug Fix: Fixed a bug where she would sometimes be able to change her Headshot target while casting it.
Patch 11.24buff

Headshot resets partially restored.

General

  • Bug Fix: Base voice lines now play more consistently and accurately.

Headshot

  • New Effect: If her current target becomes trapped by Yordle Snap Trap or 90 Caliber Net while her attack is on cooldown, this ongoing cooldown will be refunded partially so that her next attack on them can begin earlier.
  • Swapping the target to an enemy trapped by Yordle Snap Trap or 90 Caliber Net also reduces her ongoing attack cooldown.
  • Bug Fix: Fixed a bug where she was able to Headshot enemies while being revived.
Patch 11.23nerf

General

  • Complete visual update across all skins.
  • New splash artwork for Resistance, Sheriff, Safari, Arctic Warfare, and Officer.
  • Adjusted splash artwork for Original, Headhunter, Lunar Wraith, Pool Party, Arcade, and Prestige Arcade.
  • New lore.
  • New voice-over.
  • Updated sound effects.
  • Added ejected bullet when reloading her rifle.

Headshot

  • Removed: Gaining an Empowered Headshot no longer allows Caitlyn to attack the trapped target ignoring an ongoing attack cooldown.
  • Undocumented/New: Because they are proper attacks now, Headshot attacks against trapped enemies also generate a stack towards Headshot now.
  • "Passive Ready" SFX adjusted for more of a Hextech feel. Added SFX that plays when Headshot is ready for use.

Piltover Peacemaker

  • New meshes and particles made to look more Hextech. Initial on-hit SFX are now more impactful than subsequent hits.

Yordle Snap Trap

  • Added indicator on traps and their activation VFXs. Trap SFXs adjusted to match new animation timing.

90 Caliber Net

  • New range indicator. On-hit SFX are now more impactful.

Ace in the Hole

  • New laser and Hextech imagery. On-cast SFX are now more impactful and have additional Hextech elements.
Patch 11.17change

Ace in the Hole

  • Bug Fix: Fixed a bug where the extended tooltip and level-up tooltip did not contain its damage ratio.
Patch 11.15buff

Q damage ratio increased later.

Piltover Peacemaker

  • AD ratio increased to 130/145/160/175/190% AD from 130/140/150/160/170% AD.
Patch 11.8change

Battle Academia

  • Yordle Snap Trap
  • Bug Fix: Hit VO now plays from her location instead of the trap's location.
  • Ace in the Hole
  • Bug Fix: Cast VO also now plays for all enemies and allies.
Patch 11.4buff

Base damage growth and attack speed growth increased.

Stats

  • Attack damage growth increased to 3.8 from 3.3.
  • Attack speed growth increased to 4% from 3.5%.
Patch 11.2buff

AD growth increased.

Stats

  • Attack damage growth increased to 3.3 from 2.88.
Patch 10.23nerf

Headshot damage from crit chance decreased.

Headshot

  • Critical strike damage ratio reduced to (87.5% + half of bonus crit damage) from (100% + half of bonus crit damage).
Patch 10.19nerf

Base AD and AS growth decreased.

Stats

  • Base attack damage reduced to 62 from 64.
  • Attack speed growth reduced to 3.5% from 4%.
Patch 10.18change

General

  • Bug Fix: Can no longer trigger the Aspect of the Dragon execute on multiple targets.
  • Bug Fix: Can no longer trigger Summon Aery multiple times at once.
Patch 10.17nerf

Base movement speed decreased.

Stats

  • Base movement speed reduced to 325 from 330.
Patch 10.15buff

Base attack damage and movement speed increased.

Stats

  • Base attack damage increased to 64 from 62.
  • Base movement speed increased to 330 from 325.
Patch 10.13change

Yordle Snap Trap

  • Bug Fix: Properly empowers only one basic attack.
Patch 10.11buff

Stats

  • Base health increased to 510 from 481.
  • Health growth increased to 93 from 91.
Patch 10.9buff

Yordle Snap Trap

  • Bug Fix: Now properly empowers only one basic attack.
  • Undocumented: Targets affected by traps no longer gain immunity to them for a brief time, increased for each consecutive application.
Patch 10.4buff

Bonus AS at level 1 increased.

Stats

  • Bonus attack speed at level 1 increased to 20% from 10%.

Pulsefire

  • Ace in the Hole
  • Bug Fix: UI overlay now properly appears when she casts the ability.
Patch 10.2change

Headshot

  • Bug Fix: No longer gets bonus Headshots by inputting the attack-move command near the target while they are trapped and netted simultaneously.
  • Bug Fix: Can no longer use attack-move to attack trapped or netted targets while she is crowd controlled.

Piltover Peacemaker

  • Bug Fix: After casting Yordle Snap Trap into Piltover Peacemaker, her basic attacks are no longer temporarily slower than they should be.
Patch 9.22change

Headshot

  • Bug Fix: If her target dies before her Energized (via items like Rapid Firecannon and Statikk Shiv) Headshot hits them, she is no longer damaged in their stead.
Patch 9.18buff

Base attack damage increased.

Stats

  • Base attack damage increased to 62 from 60.
Patch 9.12buff

Stats

  • Base attack damage increased to 60 from 58.
Patch 9.10buff

Yordle Snap Trap

  • Base damage increased to 60/105/150/195/240 from 40/90/140/190/240.
Patch 9.9nerf

General

  • New visual effects.
  • Basic attack cleaned up noise and added new hit impacts.

Headshot

  • Brand new headshot missile and effects for better readability.

Piltover Peacemaker

  • Cleaned up noise, added a width indicator for clarity, and updated hit effects.

Yordle Snap Trap

  • Reduced activation noise and cleaned up root effect.
  • Updated ally traps as well to glow blue.

90 Caliber Net

  • Cleaned up and now more accurately represents the width of the missile.

Ace in the Hole

  • Reduced the target effect's noise, improved the timing, and added new cast, missile, and hit effects.

Headhunter

  • Cleaned up the projectiles.
  • Piltover Peacemaker
  • Added the width indicator.

Lunar Wraith

  • Cleaned up the projectiles
  • Piltover Peacemaker
  • Adjusted the width to match the new base.
  • Ace in the Hole
  • Cleaned up charging and hit effects.
Patch 9.6buff

Ace in the Hole

  • Base damage increased to 300/525/750 from 250/475/700.
Patch 9.1buff

Ace in the Hole

  • New Effect: Can now ping whether the ability is within range or not.
Patch 8.24bbuff

Piltover Peacemaker

  • Base damage increased to 50/90/130/170/210 from 30/70/110/150/190.
  • Reduced damage beyond first enemy increased to 40% from 33%.

Ace in the Hole

  • Target range increased to 3500 at all ranks from 2000/2500/3000.
Patch 8.13buff

Headshot

  • Bug Fix: No longer interacts with Stormrazor to deal extra damage while the Stormrazor buff is inactive.
  • Champion headshot damage increased to 50%/75%/100% (at level 1/7/13) (+ 125% critical strike chance) AD from 50% (+ 100% critical strike chance) AD.
  • Non-champion headshot damage increased to 100% (+ 125% critical strike chance) AD from 100% (+ 100% critical strike chance) AD.

Ace in the Hole

  • Bug Fix: Now correctly updates its range for the first use after leveling it.
Patch 8.12change

Pulsefire

  • 90 Caliber Net
  • Bug Fix: VFX have been restored.
Patch 8.11change

Stats

  • Base health increased to 481 from 475.
  • Health growth increased to 91 from 85.
  • Base armor reduced to 28 from 32.
  • Base health regeneration reduced to 3.5 from 5.5.
  • Base attack damage reduced to 58 from 62.
  • Attack damage growth increased to 2.88 from 2.18.
Patch 8.9buff

Headshot

  • Bonus damage to non-champions increased to 100% (+ 100% (+ Infinity Edge) critical strike chance) AD from 50% AD.
Patch 8.3nerf

Stats

  • Base health regeneration reduced to 5.5 from 5.65.
Patch 8.2buff

Ace in the Hole

  • New Effect: Now draws nearby minion aggro when targeting an enemy champion.
Patch 7.21change

Pulsefire

  • Yordle Snap Trap
  • Bug Fix: No longer get stuck with a blue overlay when an enemy is affected by Yordle Snap Trap.
Patch 7.20change

Piltover Peacemaker

  • Bug Fix: Rank-up tooltip now properly lists the total attack damage ratio increase between ranks.
Patch 7.19change

Stats

  • Base health reduced to 475 from 524.4.
  • Health growth increased to 85 from 80.
  • Base attack speed increased to 0.568 from 0.543.
  • Base attack delay reduced to 0.1 from 0.15.
  • Attack speed growth increased to 4% from 2%.
  • Base health regeneration reduced to 5.65 from 5.674.

Headshot

  • Passive starting bonus attack speed reduced to 10% from 15%. Level 1 attack speed is still 0.625.
  • New Effect: Can affect turrets.

Piltover Peacemaker

  • Damage to targets beyond the first increased to 67% from 50%.

Yordle Snap Trap

  • Trap duration reduced to 30/35/40/45/50 seconds at all ranks from 90.
  • Headshot bonus damage increased to 40/90/140/190/240 from 10/55/100/145/190.
  • Headshot AD ratio changed to 40/55/70/85/100% bonus AD from 60% AD at all ranks.
  • Vision duration reduced to 3 seconds from 8.
  • Recharge time changed to 30/24/19/15/12 seconds from 45/32.5/20/12.5/10.
Patch 7.16nerf

Piltover Peacemaker

  • Passthrough damage reduced to 50% from 67%.

Yordle Snap Trap

  • Trap bonus damage from Headshot reduced to 10/55/100/145/190 from 30/70/110/150/190.
  • Trap bonus damage from Headshot AD ratio reduced to 60% AD from 70% AD.
  • Bug Fix: Tooltip now displays the correct root duration of 1.5 seconds. Actual duration unchanged.
Patch 7.15change

Headhunter

  • General
  • Bug Fix: VFX during her recall no longer disappear when losing and regaining vision.
  • Yordle Snap Trap
  • Bug Fix: Traps are no longer less clear in brush compared to her other skins.
Patch 7.14nerf

Stats

  • Attack speed growth reduced to 2% from 4%.
Patch 7.12change

Pulsefire

  • Bug Fix: Quote when killing Gnar is no longer heard by everyone on the map.
  • Bug Fix: Fixed a bug where she could become covered in a blue overlay for the rest of the match if polymorphed by Whimsy while in combat.
  • Yordle Snap Trap
  • Bug Fix: Fixed a bug where Lulu could get the same blue overlay if casting Whimsy on any enemy affected by an allied Yordle Snap Trap.
Patch 7.11change

Stats

  • Base attack speed reduced to 0.543 from 0.568.
  • Attack delay increased to 0.15 from 0.1.

Headshot

  • Runaan's Hurricane no longer grants Headshot stacks on secondary targets.
  • Passive starting bonus attack speed increased to 15% from 10%. Level 1 attack speed is still 0.625.

Piltover Peacemaker

  • Bug Fix: Fixed a bug causing the projectile of an enemy Piltover Peacemaker to not properly appear until it hit a unit when fired from fog of war.

Pulsefire

  • Bug Fix: Various VO lines triggered when she scores a pentakill, ace, or killing spree now properly play.
  • Bug Fix: The underside of Teemo's stolen hat no longer looks kinda weird during her Recall.
Patch 7.4change

Lunar Wraith

  • Piltover Peacemaker
  • Bug Fix: Fixed a bug where the SFX were distorting when hitting multiple minions.
Patch 6.15change

Yordle Snap Trap

  • Bug Fix: Untargetable champions can no longer proc the trap.
  • Bug Fix: Improved visibility of Lunar Wraith Caitlyn's trap.
Patch 6.4buff

Yordle Snap Trap

  • Bonus Headshot damage changed to 30/70/110/150/190 (+ 70% AD) from 10/20/30/40/50% increased damage.
  • New Effect: Traps now display their area-of-effect range to Caitlyn.

90 Caliber Net

  • Cooldown reduced to 16/14.5/13/11.5/10 seconds from 18/16/14/12/10.
Patch 6.1change

Headshot

  • Bug Fix: Caitlyn would often path into her normal attack range to perform the Headshot attack.
  • Bug Fix: Caitlyn first attack after a Headshot would take longer to complete.
  • Bug Fix: Using Headshot on a different target to her current attack target would take longer to complete.

Yordle Snap Trap

  • Improved collision detection for smaller enemies.
Patch 5.24change

Headshot

  • Stacks changed to 6 at all levels from 7/6/5 (at level 1/7/13).
Patch 5.23nerf

Headshot

  • Reduced the frequency of the "Boom, Headshot!" line.

Piltover Peacemaker

  • Damage to targets beyond the first reduced to 33% from 40%.
Patch 5.21change
Patch 5.18buff

Yordle Snap Trap

  • Mana cost reduced to 30 from 50.
  • Cooldown reduced to 16/14/12/10/8 seconds from 20/17/14/11/8.
Patch 5.11buff

Headshot

  • New Effect: Now ignores 50% of the target's bonus armor against enemy champions.

Yordle Snap Trap

  • Fixed a bug where the trap could take any time between 1 and 1.25 seconds to arm. It is now always 1.1 seconds.
  • Fixed a bug where certain dashes could pass over the trap without triggering it.

Ace in the Hole

  • sight is now granted on-click instead of after the 0.25 second cast time. The ability should no longer cancel if you lose sight of the target.
Patch 5.8change

Yordle Snap Trap

  • Bush visibility improved.
Patch 4.15change

General

  • Fixed a bug where abilities that give true sight of enemy champions would reveal stealth wards under certain circumstances.
Patch 4.12change

General

  • Fixed a bug where Caitlyn's basic attacks were registering as attacks before they visually hit the target.
Patch 4.11change

General

  • New Classic splash art.
Patch 4.1change

Ace in the Hole

  • Bug fix: The projectile should now be correctly destroyed if the target becomes untargetable.
Patch 3.15change

General

  • New running animation.
Patch 3.7change

Stats

  • Base attack speed reduced to 0.625 from 0.668.
  • Attack speed per level increased to 4% from 3%.

Headshot

  • No longer gains stacks when attacking structures.
Patch 1.0.0.142buff

General

  • Updated tooltips.

90 Caliber Net

  • Cast time reduced.

Ace in the Hole

  • Range increased to 2000/2500/3000 from 1900/2050/2200.
  • Channel time reduced to 1 second from 1.25.
Patch 1.0.0.141change

Yordle Snap Trap

  • Now properly ignores unit collision when placed.
Patch 1.0.0.140change

Ace in the Hole

  • Fixed a bug where Caitlyn would appear to attack during channeling.
Patch 1.0.0.133change

Headshot

  • Fixed a bug where it did not trigger while taunted or silenced.
Patch 1.0.0.129nerf

Stats

  • Movement speed reduced to 300 from 305.
Patch 1.0.0.128nerf

Piltover Peacemaker

  • Base damage reduced to 20/60/100/140/180 from 20/65/110/155/200.

Yordle Snap Trap

  • Activation radius reduced to 135 from 150.
Patch 1.0.0.125change

Yordle Snap Trap

  • Will now show the area it triggers in when cast.

Ace in the Hole

  • Fixed a bug where it would fail to reset cooldown if Karthus or Kog'Maw died during the channel time.
Patch 1.0.0.123change

Yordle Snap Trap

  • Fixed a bug where planting a new trap after another was recently triggered caused a previous trap to be disabled.
Patch 1.0.0.116buff

Yordle Snap Trap

  • Mana cost reduced to 50 from 60.
  • Activation range increased to 150 from 125.

90 Caliber Net

  • Mana cost reduced to 75 from 90.

Ace in the Hole

  • Mana cost reduced to 100 from 150.
  • Range increased to 1900/2050/2200 from 1600/1900/2200.
Patch 1.0.0.114buff

Stats

  • Attack speed per level increased to 3% from 2.6%.

Yordle Snap Trap

  • Max trap count increased to 3 from 2.
Patch 1.0.0.113nerf

Headshot

  • Stacks required reduced to 8/7/6 (at level 1/7/13) from 8 attacks at all levels.
Patch 1.0.0.112buff

Ace in the Hole

  • Projectile speed increased to 3200 from 2200.
  • Range increased to 1600/1900/2200 from 1400/1800/2200.
  • Initial cast time leading up to the channeling time significantly decreased.
Patch 1.0.0.111change

General

  • Updated tooltips.
Patch 1.0.0.109buff

Piltover Peacemaker

  • Base damage changed to 20/65/110/155/200 from 40/70/100/130/160.
  • Attack damage scaling increased to 1.3 from 1.
  • Damage loss per unit increased to 10% from 6%.
  • Maximum damage loss increased to 50% from 30%.

Ace in the Hole

  • Base damage increased to 250/475/700 from 250/400/550.
  • Now provides vision on the target for the duration and thus is not canceled when the target leaves line of sight.
  • Damage is now treated as a spell instead of an attack.
  • No longer triggers on-hit effects like Blessing of the Lizard Elder.
  • Now triggers spell effects like Rylai's Crystal Scepter.
  • Cannot be dodged or blocked by Aegis Protection.
  • Fixed a bug where it didn't scale from the Havoc mastery.
Patch 1.0.0.108new

Caitlyn added to League of Legends

Headshot (Innate)

  • Every 8 attacks (attacks while in brush count as 2), Caitlyn will fire a headshot, dealing either 150% damage to a champion or 250% damage to a minion.

Piltover Peacemaker (Q)

  • Caitlyn revs up her rifle for 1 second to unleash a penetrating shot which deals physical damage (deals less damage to subsequent targets).

Yordle Snap Trap (W)

  • Caitlyn sets a trap to reveal sneaky yordles. When sprung, the trap immobilizes the champion and deals magic damage over 1.5 seconds.

90 Caliber Net (E)

  • Caitlyn fires a heavy net to slow her target, the recoil knocks Caitlyn back.

Ace in the Hole (Ultimate)

  • Caitlyn takes time to line up the perfect shot, dealing massive damage to a single target at a huge range. Enemy champions can intercept the bullet for their ally.