Mortuary + Bolas's Citadel + Tinder Wall + Vengeful Bloodwitch

Mortuary

Bolas's Citadel

Tinder Wall

Vengeful Bloodwitch

How it works

1. Activate Tinder Wall by sacrificing it.
2. When Tinder Wall dies, Mortuary and Vengeful Bloodwitch trigger.
3. Resolve the Mortuary trigger, putting Tinder Wall from your graveyard onto the top of your library.
4. Resolve the Vengeful Bloodwitch 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 loop is a masterclass in recycling, turning a humble mana-producer into an endless engine of doom. By leveraging Bolas's Citadel, you bypass traditional mana costs entirely, paying life instead to cast Tinder Wall directly from the top of your library. When you sacrifice Tinder Wall for red mana, Mortuary catches it on its way to the graveyard and immediately places it right back on top of your library for the Citadel to grab again. Meanwhile, Vengeful Bloodwitch watches the carnage, quietly draining your opponents' life totals and padding your own with every single iteration.