Mortuary + Relic Vial + Accursed Centaur + Gwenom, Remorseless

Mortuary

Relic Vial

Accursed Centaur

Gwenom, Remorseless

How it works

1. Cast Accursed Centaur by paying its mana cost.
2. Activate Accursed Centaur by sacrificing it.
3. When Accursed Centaur dies, Mortuary and Relic Vial trigger.
4. Resolve the Mortuary trigger, putting Accursed Centaur from your graveyard onto the top of your library.
5. Resolve the Relic Vial trigger, causing each opponent to lose 1 life and you to gain 1 life.
6. Cast Accursed Centaur from the top of your library by paying 1 life.
7. Repeat from step 2.