
Passive
Death Defied
Upon dying, Karthus enters a spirit form that allows him to continue casting spells.

the Deathsinger
Riot Data Dragon 16.20.1. Base values before items, runes and bonuses; independent of match-data filters.
Official short descriptions · Data Dragon 16.20.1
Base-game reference only. Item, rune and mode-specific adjustments are not included.
This reference covers the passive and four ability slots. Alternate forms and full damage calculations are not covered.

Passive
Upon dying, Karthus enters a spirit form that allows him to continue casting spells.

Q
Karthus unleashes a delayed blast at a location, dealing damage to nearby enemies. Deals increased damage to isolated enemies.
Base values from ability rank 1 upward.

W
Karthus creates a passable screen of leeching energy. Any enemy units that walk through the screen have their Move Speed and Magic Resist reduced for a period.
Base values from ability rank 1 upward.

E
Karthus passively steals energy from his victims, gaining Mana on each kill. Alternatively, Karthus can surround himself in the souls of his prey, dealing damage to nearby enemies, but quickly draining his own Mana.
Base values from ability rank 1 upward.

R
After channeling for 3 seconds, Karthus deals damage to all enemy champions.
Base values from ability rank 1 upward.
This champion is not included in the synthetic stats sample. Changing filters will not create a build or matchup record.
No verified professional match data is connected. Sample builds are not professional recommendations.