Irelia

Arena changes

• I: On-hit base damage changed to 15 to 100.
• W: Cooldown changed to 16 to 12 seconds.
• W: Magic damage reduction changed to 75% of physical damage reduction.
• R: Bladesurge cooldown reduction changed to 1.5 to 3.5 3.
• R: Cooldown changed to 40 seconds at all ranks.
• R: AP ratio changed to 100% AP.²

• Mystic Punch, Dashing, and Dual Wield can support a difficult-to-hit Perma Q build.³
• With Mystic Punch and high cooldown reduction, Irelia can repeatedly cast Q.⁴⁵
• Irelia can be weak early and item reliant in Arena; low health and resistances can make it hard to stay in extended fights.⁶⁷
• Reaper's Roll can be used in a damage-focused Irelia build.⁸
• Earthwake can be used with an Irelia build focused on repeated Q casts.⁵
• Taking items when Gamba is the first augment can work for Irelia; after securing two or three core prismatics, the items can be replaced with another prismatic augment.⁹

• Essence Reaver restores mana on hit in Arena and can support Irelia's Mystic Punch use.¹⁰
• Irelia can reach maximum passive stacks by hitting spells, and low cooldowns make it hard not to have maximum stacks.¹¹
• Irelia's Q can dash onto part of the map using the new map mechanics, much like dashing to minions.¹²

• Irelia's attack speed can exceed the cap; after taking Cerberus, it fell to 4.0.¹³

• Irelia's attack speed exceeded the cap before taking Cerberus, then fell to 4.0.¹³

Earlier formats

• Irelia could dash to minions summoned by Minion Madness, giving her more targets for Q.¹⁴¹⁵ 8x2 duos
• Irelia had little prismatic item preference and could use any prismatic item.¹⁶ 8x2 duos