Rammus receives bonus attack damage equal to 25% of his total armor.
Cost: 70 / 80 / 90 / 100 / 110 mana
Active: Rammus enters a rolling ball state for up to 7 seconds, constantly accelerating from an initial bonus 3% move speed up to a bonus 165% move speed. While in this state, Rammus cannot attack or use Puncturing Taunt. Casting Powerball again during its duration will end it instantly.
Upon impacting with an enemy unit, Rammus will knock back all nearby enemies, dealing magic damage. Additionally, enemies affected by the impact will be slowed for 3 seconds.
Powerball will end if Defensive Ball Curl is activated during its duration.