Mortuary + Dross Harvester + Viscera Seer + Gwenom, Remorseless

Mortuary

Dross Harvester

Viscera Seer

Gwenom, Remorseless

How it works

1. Activate Viscera Seer by sacrificing it.
2. When Viscera Seer dies, Mortuary and Dross Harvester trigger.
3. Resolve the Mortuary trigger, putting Viscera Seer from your graveyard onto the top of your library.
4. Resolve the Dross Harvester trigger, causing you to gain 2 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 turns Viscera Seer into an endlessly recurring sacrifice engine by using Mortuary to redirect it straight from the graveyard to the top of your library whenever it dies. Gwenom, Remorseless enables you to cast that sacrificed seer right back from the top of your library, swapping its traditional mana cost for a payment of 1 life thanks to Gwenom's alternative casting ability. Meanwhile, Dross Harvester steps in to cushion that life expenditure by generating a steady stream of life whenever a creature dies, offsetting the cost and keeping your life total stable as you churn through infinite sacrifice and death triggers.