Karthus is a Battle Mage adept at close range dueling. His array of area of effect abilities, potent crowd control and ability to defy death allows him to get close and dangerous to the enemy team, shredding through their health pools before casting his iconic ultimate. Requiem
Upon dying, Karthus enters a spirit form and becomes invulnerable and untargetable, allowing him to continue casting spells at no cost for 7 seconds.
Karthus will still benefit from cooldown reduction during Death Defied's duration.
Death Defied will still trigger if Karthus is killed by the Nexus Obelisk.
COST: 20 / 26 / 32 / 38 / 44 Mana
Active: Karthus creates a point of unstable magic at the target location that detonates after a 0.5 second delay, dealing magic damage to enemies in a 200*-radius area (the damage is doubled if only one enemy is hit).
Lay Waste grants a small instance of sight before detonation.
Lay Waste hitting a single target lists damage as a critical strike both in the damage text in game and in the post-game screen, where the damage from Karthus's most powerful Lay Waste will appear in the post-game's "Largest Critical Strike" section of the graphs.
PENDING FOR TEST Despite this, Lay Waste can not actually critically strike and, as such, does not scale with Critical Strike Damage even if it hits a single target.
Wall of Pain
COST: 100 Mana
Active: Karthus creates a wall of energy between 2 obelisks at target position for 5 seconds.