Mortuary + Accursed Centaur + Gwenom, Remorseless + Sifa Grent

Mortuary

Accursed Centaur

Gwenom, Remorseless

Sifa Grent

How it works

1. Cast Accursed Centaur from the top of your library by paying 1 life.
2. When Accursed Centaur enters, it triggers, causing you to sacrifice it.
3. When Accursed Centaur dies, Mortuary and Sifa Grent trigger.
4. Resolve the Mortuary trigger, putting Accursed Centaur from your graveyard onto the top of your library.
5. Resolve the Sifa Grent trigger, causing you to gain 1 life and target opponent to lose 1 life.
6. Repeat.

This clever loop turns the top of your library into an endless revolving door for Accursed Centaur, all fueled by Gwenom, Remorseless allowing you to play creature spells straight off the library at the cost of your life total instead of mana. Each time the Centaur enters the battlefield, its own mandatory sacrifice trigger immediately takes it down, which gracefully feeds Mortuary so it can slide the Centaur right back onto the top of your library. Meanwhile, Sifa Grent happily watches the procession, turning every single death into an unyielding drain of life from your opponents while replenishing your own life total to offset Gwenom's casting costs.