Death Defied (Passive)
Upon dying, Karthus enters a spirit form that allows him to continue casting spells.
Lay Waste (Q)
Cooldown: 0
Cost: 20/25/30/35/40
Range: 875
Karthus creates a blast of magic, dealing magic damage. If the blast hits only one enemy, it instead deals magic damage.d
Wall of Pain (W)
Cooldown: 15
Cost: 70
Range: 1000
Karthus creates a wall that lasts for 5 seconds. Enemies that pass through lose 25% Magic Resist for 5 seconds and are Slowed by 40/50/60/70/80% decaying over the duration.d
Defile (E)
Cooldown: 0.5
Cost: 30/42/54/66/78 Mana per Second
Range: 550
Passive: When Karthus kills a unit, he restores 10/20/30/40/50 Mana.Toggle: Karthus creates a necrotic aura, dealing s magic damage per second to nearby enemies.d
Requiem (R)
Cooldown: 200/180/160
Cost: 100
Range: 10000
Karthus channels for 3 seconds, then deals magic damage to enemy champions, regardless of distance.d