Veigar's mana regeneration is increased by 1% for each 1% of mana he's missing.
Baleful Strike
Range: 650
Cooldown: 8 / 7 / 6 / 5 / 4
Cost: 60 / 65 / 70 / 75 / 80 mana
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 Gain per Champion Kill: 1 / 2 / 3 / 4 / 5
Active: Unleashes dark energy at target enemy, dealing magic damage. If this ability deals a killing blow, Veigar gains 1 ability power permanently. This bonus is doubled for large minions, large monsters, and champions.
Active: Veigar calls a great mass of dark matter to fall from the sky to the target area, which lands after a 1.2 second delay, dealing magic damage. This ability also provides vision through fog of war or brushes before it lands.
Event Horizon is only capable of stunning an enemy once. Meaning that if someone gets stunned once, they gain immunity to further stuns from the same Event Horizon.
Enemies with spell shields, like Banshee's Veil or Morgana'sBlack Shield, will not be affected by the stun from Event Horizon when walking through it and will have immunity if they pass through it again.
1350 or 
585
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