Passive: Veigar gains permanent bonus ability power when he kills a champion from any source of damage. This stacks with the active ability's AP gain.
Ability Power per Champion Kill: 1 / 2 / 3 / 4 / 5
Active: Unleashes a ball of dark energy in a line, dealing magic damage to up to two enemy units. Every time this ability kills a unit, Veigar gains 1 ability power permanently (doubled against large minions, large monsters, and champions).