Mortuary + Bolas's Citadel + Tinder Wall + Susurian Voidborn

Mortuary

Bolas's Citadel

Tinder Wall

Susurian Voidborn

How it works

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

This clever loop turns the self-sacrificing mana of Tinder Wall into an engine of continuous drain and recursion. Thanks to Bolas's Citadel, you can cast Tinder Wall directly from the top of your library by paying 1 life instead of its mana cost, while Mortuary catches it in the graveyard and neatly places it right back on top of your library each time it hits the bin. Meanwhile, Susurian Voidborn watches over the entire process, turning every single sacrifice into a life-draining trigger that easily offsets the life you spent to keep the Citadel casting.