Duo
| Style | Global Requiem and Sejuani's control |
| Difficulty | Medium To verify |
| Strong at | Mid game and team fights |
| Weak against | Assassins and compositions with a lot of poke To verify |
| Patch tier | Pending |
| Win rate | Pending |
Why it works
- Karthus's R is map-wide. After focusing his power for 3 s, it damages all enemy champions (range 10000).
- Sejuani freezes. Her R throws a bola that freezes and stuns the first champion and slows the rest; her E stuns with Frost stacks.
- Her Q knocks into the air and stops when it hits a champion.
- Karthus's wall slows and reduces the magic resistance of whoever crosses it.
Weak points: Assassins and compositions with a lot of poke; it depends on coordination between both players. To verify
Powerspikes by level
| Level | What changes | How to play it |
|---|---|---|
| 6 | Sejuani's R stuns and Karthus's R damages the whole team. | Coordinate the play before going in. |
| 11 | Key items: Karthus finishes far-off fights. | Coordinate the play before going in. |
Combo (team fight)
- Sejuani: Q to go in and knock up.
- Karthus: W to slow the group.
- Sejuani: R on the target.
- Karthus: R at the end. To verify
Combo mistakes: doing it when the other isn't ready or without vision of the map.
Level 6 protocol
- Sejuani: R to pin the target.
- Karthus: R for the global damage. To verify
Game plan
| Phase | Goal | Key action |
|---|---|---|
| Start | Farm without giving away health. | Vision and communication. |
| 6-5 | First strong trade. | Sejuani's R stuns and Karthus's R damages the whole team. |
| 6+ | Decisive fights. | Key items: Karthus finishes far-off fights. |
Runes and summoner spells
To verify
| Champion | Main path | Spells |
|---|---|---|
| Karthus | Arcane Comet or Electrocute | Flash + Ignite or Barrier |
| Sejuani | Guardian or Conqueror | Flash + Smite |
Items, matchups and bans
Pending No patch data. Bans by mechanic (hypotheses to verify): Assassins and compositions with a lot of poke. Win-rate-based bans will come with Riot API data. To verify
Critical mistakes to avoid
- Casting Karthus's R without checking the enemy has no heal.
- Karthus without protection.
- Wasting Sejuani's R for no reason.
How to play against Karthus + Sejuani
Kill Karthus before he finishes channeling. To verify
Frequently asked questions
What does Karthus's R do? After 3 s of focus, it deals damage to all enemy champions.
Methodology and updates
- Data source: abilities from Data Dragon 16.21.1; own analysis, untested.
- Last review: Pending.
