Mortuary + Bolas's Citadel + Viscera Seer + Funeral Room // Awakening Hall

Mortuary

Bolas's Citadel

Viscera Seer

Funeral Room // Awakening Hall

How it works

1. Activate Viscera Seer by sacrificing it.
2. When Viscera Seer dies, Mortuary and Funeral Room // Awakening Hall trigger.
3. Resolve the Mortuary trigger, putting Viscera Seer from your graveyard onto the top of your library.
4. Resolve the Funeral Room // Awakening Hall trigger, causing you to gain 1 life and each opponent to lose 1 life.
5. Resolve the Viscera Seer ability.
6. Cast Viscera Seer from the top of your library by paying 1 life.
7. Repeat.

This ingenious loop turns a single tiny sacrifice into a self-sustaining engine of life and death. You use Viscera Seer to sacrifice itself, triggering Mortuary to seamlessly recycle it right back to the top of your library instead of letting it rest. Meanwhile, Bolas's Citadel allows you to immediately cast that same creature right back off the top of your library, trading a tiny sliver of life instead of its mana cost. To round it all out, Funeral Room // Awakening Hall acts as your win condition and life buffer, draining your opponents and healing you every single time a creature dies in the loop.