Elbrus, the Binding Blade // Withengar Unbound + Triskelion + Agatha's Soul Cauldron + Triumph of the Hordes

Elbrus, the Binding Blade // Withengar Unbound

Triskelion

Agatha's Soul Cauldron

Triumph of the Hordes

How it works

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