Katarina

Arena changes

• I: Cooldown reduction changed to 15 seconds.
• I: Dagger bonus AD ratio changed to 100% bonus AD.
• Q: Base damage changed to 80 to 300.
• Q: AP ratio changed to 60% AP.
• E: Base damage changed to 60 to 120.
• E: AD ratio changed to 50% AD.
• E: AP ratio changed to 40% AP.
• R: Base damage per dagger changed to 50 to 75 3.
• R: AP ratio per dagger changed to 22% AP.²

• Ethereal Weapon, Tap Dancer and Don't Blink are a strong augment combination for Katarina.³
• Ethereal Weapon, Mystic Punch and Puppeteer are a strong combination for Katarina.⁴
• A tanky build with Mystic Punch can let Katarina stack Titan's Resolve to high levels.⁵
• Ethereal Weapon, Mystic Punch and Puppeteer can let Katarina use Death Lotus repeatedly.⁶⁷⁴

• With some omnivamp, Puppeteer can rapidly reduce its cooldown through Katarina's ability resets and trigger on each Death Lotus.⁸
• Death Lotus applies on-attack effects.⁹¹⁰
• Marksmage does not trigger on Death Lotus.¹¹
• Katarina's ultimate can critically strike with Vulnerability or Jeweled Gauntlet.¹²¹³
• An autocast combination using Energetic, Runecarver, Hexbolt, Lightning Rod, Firefox, Wildfire and Quantum Computing can loop on Katarina.¹⁴¹⁵
• With Chauffeur and Mystic Punch, Katarina can use E to disconnect, move around, and be pulled around while channeling Death Lotus.¹⁶
• Katarina's Dance of Voracity can offer an augment tier upgrade alongside new augments.¹⁷¹⁸
• The augment Killing Time does not count damage from Death Lotus until its channel ends.¹⁹

• With Hive Mind, Katarina's ultimate can deal very little damage with its bees; one use with at least 15 bees dealt about 100 damage.²⁰
• Katarina's ultimate sometimes cancels with Chauffeur.²¹
• Despoil does not gain stacks from blinks such as Katarina's E.²²
• Katarina's ultimate can give Titan's Resolve only one stack even when it hits multiple opponents.²³

• Since patch 26.9, Katarina's Dance of Voracity offers augment tier-ups alongside new augments.¹⁸
• Katarina's ultimate no longer fully resets on takedown.²⁴
• Katarina's ultimate previously worked with Slow and Steady, but the interaction later dealt very little damage.²⁵

Earlier formats

• Patch 25.18 adjusted Katarina's passive to fully reset her ultimate on takedown, alongside changes to her basic abilities.³¹ 8x2 duos
• One Death Lotus sometimes gave Katarina over 1,000 ability power with Ethereal Weapon and Edge of Duality.³² 8x2 duos
• Fulmination worked with Death Lotus, and its cooldown depended partly on the dagger effects.³³ 8x2 duos
• Hamstringer worked with the augment that makes spells critically strike.³⁴ 8x2 duos
• During the eight-teams-of-two format, Panic Room did not interrupt Death Lotus when it triggered during the channel, even if Katarina died or teleported away.³⁵³⁶³⁷ 8x2 duos
• During the eight-teams-of-two format, attack speed and attack damage builds could gain substantial scaling from anvils, increasing Death Lotus's damage.³⁸ 8x2 duos
• During the eight-teams-of-two format, Ethereal Weapon could work well on Katarina alongside items such as Nashor's Tooth and Wit’s End.³⁹ 8x2 duos
• During the eight-teams-of-two format, Katarina's ultimate could trigger Voltaic Cyclosword four times, plus once more after using E and getting two daggers.⁴⁰ 8x2 duos
• During the eight-teams-of-two format, Katarina's ultimate applied grievous wounds.⁴¹⁴²⁴³ 8x2 duos
• During the eight-teams-of-two format, Death Lotus applied Statikk Shiv stacks at full effectiveness almost instantly.⁴⁴⁴⁵⁴⁶ 8x2 duos
• During the eight-teams-of-two format, Fan the Hammer could trigger Statikk Shiv through Death Lotus.⁴⁵⁴⁶⁴⁷ 8x2 duos
• During the eight-teams-of-two format, Death Lotus triggered Statikk Shiv's five attacks at full effectiveness almost instantly, and the item could bounce damage between the opponents.⁴⁸⁴⁴⁴⁵ 8x2 duos
• During the eight-teams-of-two format, Statikk Shiv could deal high damage through Katarina's ultimate because its damage was not reduced by on-hit reducers.⁴⁹⁴⁸ 8x2 duos