Veigar

Innate: Veigar generates a stack of Phenomenal Evil for each enemy champion hit by his abilities, and 5 stacks whenever he scores an enemy champion takedown.

Phenomenal Evil: For each stack, Veigar gains 1 ability power.

Active: Veigar blasts a dark bolt in the target direction that deals magic damage to the first two enemies hit.

If this kills an enemy, it generates 1 stack of Phenomenal Evil, tripled against large minions and monsters.

Active: Veigar casts down a mass of dark matter that strikes the target location after a 1.221 seconds delay, granting sight of the area during the delay and afterwards dealing magic damage to enemies hit.

Dark Matter's cooldown is reduced based on stacks of Phenomenal Evil.

Active: Veigar forms a cage at the target location that erects after a 0.5 second delay, remaining there for 3 seconds. Enemies that collide with the edges of the cage are knocked down and stunned for a duration.

Event Horizon can affect enemies only once per cast.

Active: Veigar sends a primordial burst at the target enemy champion that deals magic damage, increased by 0% – 100% (based on target's missing health).