Karthus is a mage champion in League Classic. Find the recommended setup with full item build, summoner spells, ability priority, masteries, runes, and community builds.
Karthus Builds
Karthus Mid
Starting Items
Full Build
- Summoner Spells
- Ability Priority
Lay Waste (Q) › 
Defile (E) › 
Wall of Pain (W)
- Runes
- 9×
Mark of Magic Penetration9× 
Seal of Armor9× 
Glyph of Magic Resist3× 
Quintessence of Ability Power - Masteries
Offense: 21
Defense: 0
Utility: 9
Community Karthus Builds
Karthus in League Classic
Champion Bio
When Karthus released as an original 40 champion, he wasn't much different than the one we know today. He'd safely farm mid, then ult during a teamfight and pick up easy assists. But the skeletal singer's old version of Death Defied (P) ended his respawn cooldown if he got a kill, making him near immortal.
What Changed in Classic
- The dead never change
Karthus Abilities
Death Defied
PPASSIVE: Upon dying, Karthus enters a spirit form that allows him to continue casting spells.
Lay Waste
QACTIVE: Creates a delayed blast, after 0.5 seconds, deals 40 / 60 / 80 / 100 / 120 (+30% AP) magic damage to each nearby enemy, this deals double damage if it hits only a single unit.
Wall of Pain
WACTIVE: Creates a wall at target location that lasts for 5 seconds. Enemies that pass through the wall have their Magic Resist reduced by 15% and Slowed by 40 / 50 / 60 / 70 / 80% for 5 seconds (their Movement Speed gradually recovers over the duration).
Defile
EACTIVE: Toggle Off: When Karthus kills a unit, he restores 20 / 27 / 34 / 41 / 48 Mana.
Toggle On: Deal 30 / 50 / 70 / 90 / 110 (+20% AP) magic damage to nearby enemies each second.
Requiem
RACTIVE: After channeling for 3 seconds, Karthus deals 250 / 400 / 550 (+60% AP) magic damage to all enemy champions.