Irelia Ability (LoL): Ionian Fervor

Irelia gains a stack for 6 seconds when she hits an enemy with an ability (for a maximum of 4). She gains 10-25% attack speed per stack, up to 40-100% attack speed and at max stacks her attacks deal an additional 10-61 (+0.2 per bonus attack damage) magic damage (depending on level). Damage is applied to structures at 50% effectiveness.

Attacking a champion, large monster or structure refreshes the duration of the stacks. Irelia gains one stack per champion hit and one stack for hitting minions.