Mortuary + Bolas's Citadel + Tinder Wall + Embalmed Ascendant

Mortuary

Bolas's Citadel

Tinder Wall

Embalmed Ascendant

How it works

1. Activate Tinder Wall by sacrificing it.
2. When Tinder Wall dies, Mortuary and Embalmed Ascendant trigger.
3. Resolve the Mortuary trigger, putting Tinder Wall from your graveyard onto the top of your library.
4. Resolve the Embalmed Ascendant trigger, causing you to gain 1 life and each opponent to lose 1 life.
5. Cast Tinder Wall from the top of your library by paying 1 life.
6. Repeat.

This loop turns a humble sacrifice into an unstoppable engine by looping Tinder Wall endlessly from the top of your library using Bolas's Citadel to cast it for life instead of mana. Each iteration is caught by Mortuary, which immediately places the sacrificed wall right back where the Citadel can see it. Meanwhile, Embalmed Ascendant acts as the linchpin of the whole operation, providing the life gain necessary to offset the Citadel's costs while turning every single death into life loss for your opponents.