Elbrus, the Binding Blade // Withengar Unbound + Triskelion + Agatha's Soul Cauldron + Corrupted Conscience

Elbrus, the Binding Blade // Withengar Unbound

Triskelion

Agatha's Soul Cauldron

Corrupted Conscience

How it works

1. Deal combat damage to an opponent using Withengar Unbound, causing them to get at least ten poison counters.
2. The opponent loses the game as a state-based action due to having ten or more poison counters.
3. Withengar Unbound triggers, putting thirteen +1/+1 counters on it.
4. Activate Withengar Unbound using Triskelion's ability by removing a +1/+1 counter from it, giving an opponent a poison counter.
5. Repeat step 4 until the opponent loses the game as a state-based action due to having ten or more poison counters.
6. Repeat from step 3.