Mortuary + Bolas's Citadel + Viscera Seer + Ashes of the Abhorrent

Mortuary

Bolas's Citadel

Viscera Seer

Ashes of the Abhorrent

How it works

1. Activate Viscera Seer by sacrificing it.
2. When Viscera Seer dies, Mortuary and Ashes of the Abhorrent trigger.
3. Resolve the Mortuary trigger, putting Viscera Seer from your graveyard onto the top of your library.
4. Resolve the Ashes of the Abhorrent trigger, causing you to gain 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 clever loop lets you endlessly sacrifice and recast a creature for virtually no cost by turning your library into a renewable recycling bin. Viscera Seer acts as the sacrificial outlet, while Mortuary catches that creature as it dies and immediately tucks it right back onto the top of your library. From there, Bolas's Citadel allows you to cast the Seer directly off the top of your deck, swapping mana costs for life payments. To keep you from bleeding out, Ashes of the Abhorrent steps in as a life-gain engine, quietly healing you with every death to offset the Citadel's toll and keep the cycle running indefinitely.