3 Karthus combos explained key by key: in which order to cast the abilities, when to use them and what each step does. The main combo is Q › Q › W. Further down: every ability's cooldown, cost and range, and the skill max order measured over ranked games.
When: An enemy is isolated.
Lay Waste explodes on a delay with more damage on an isolated target; Wall of Pain reduces the speed and magic resistance of those who cross it.
When: Enemies are weakened everywhere.
Requiem channels for 3 seconds then deals damage to all enemy champions: use it to finish several targets from a distance.
When: You die in the middle of a fight.
Death Defied gives you a spirit form that lets you keep casting spells: take advantage of it to cast Requiem or Lay Waste.
A combo only comes back once its abilities are off cooldown: these values (rank 1 to max rank, in seconds) tell how long to wait between two combos. Source: Data Dragon 16.19.1.
| Ability | Cooldown (s) | Cost | Range |
|---|---|---|---|
| 0 | 20/25/30/35/40 Mana | 875 | |
| 15 | 70 Mana | 1000 | |
| 0.5 | 30/42/54/66/78 Mana per Second | 550 | |
| 200/180/160 | 100 Mana | 10000 |
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ● | ● | ● | ● | ● | |||||||||||
| ● | ● | ● | |||||||||||||
| ● | ● | ● | ● | ● | |||||||||||
| ● | ● |
The order shows which abilities reach rank 5 first; the grid shows the most-played level-up sequence with that order (measured over 53 games).
Harassment: Q › Q › W. An enemy is isolated. Lay Waste explodes on a delay with more damage on an isolated target; Wall of Pain reduces the speed and magic resistance of those who cross it.
The most-played max order is Q > E > W (49 games, 49.0% win rate).
Requiem has a 200/180/160 second cooldown depending on its rank.
Build, runes and counters: full Karthus guide · every champion's combos · tier list