Illaoi

Arena changes

• I: Heal health ratio changed to 2.5% missing health.
• Q: Bonus tentacle damage changed to 10 to 30%.
• W: Cooldown changed to 6 seconds.²

• Build bruiser items with high AD to improve E conversion, land E when possible, and engage second or third rather than going in first.³
• Build health and AD with Heartsteel.⁴⁵

• With Blitz's E in an on-hit build, Illaoi's abilities can gain a knockup effect.⁶
• Illaoi can spawn tentacles for an ally.⁷
• Illaoi's E can generate extra Heartsteel stacks.⁵⁸
• At max level, Mirror Image can make Illaoi's E spirit autocast her abilities; Extendo Arm was also in the build.⁹
• Illaoi's E scales better-than-linearly with a stat, though it takes more for that scaling to spiral out of control than it does for some other champions.¹⁰
• Damage amplifiers apply once to Illaoi's E target and again to the champion when E reflects the damage; enough AD can make the reflection exceed 100% damage.¹¹

Earlier formats

• With Ethereal Weapons, Illaoi can gain Heartsteel stacks from a dummy spirit through tentacle slams.¹³ 8x2 duos
• During the shopping phase, a Swain on another team can use W on a dummy spirit pulled by Illaoi's E to gain soul fragments for his passive.¹⁴¹⁵ 8x2 duos
• Blade Waltz during W can make tentacles slam repeatedly before an empowered attack adds another slam.¹⁶¹⁷ 8x2 duos
• Illaoi's healing was nerfed in patch 14.10.¹⁸ 8x2 duos