Mirrorwing Dragon + Venerated Rotpriest + Storm Herd

Mirrorwing Dragon

Venerated Rotpriest

Storm Herd

How it works

1. Cast Storm Herd by paying 8, creating a number of 1/1 Pegasus creature tokens equal to your life total.
2. Cast any instant or sorcery by paying its mana cost, targeting Mirrorwing Dragon.
3. Mirrorwing Dragon and Venerated Rotpriest trigger.
4. Resolve the Venerated Rotpriest trigger, causing an opponent to get a poison counter.
5. Resolve the Mirrorwing Dragon trigger, copying the spell for each other creature you control, with each copy targeting a different creature.
6. Venerated Rotpriest triggers for each copy made this way.
7. Resolve the first trigger, causing an opponent to get a poison counter.
8. If the opponent has ten poison counters, they lose the game.
9. Repeat from step 7 for each remaining trigger.