Mortuary + Shilgengar, Sire of Famine + Ornithopter + Gwenom, Remorseless

Mortuary

Shilgengar, Sire of Famine

Ornithopter

Gwenom, Remorseless

How it works

1. Activate Shilgengar by sacrificing Ornithopter
2. When Ornithopter dies, Mortuary triggers, putting Ornithopter from your graveyard onto the top of your library.
3. Resolve the Shilgengar ability.
4. Cast Ornithopter from the top of your library by paying 0 life.
5. Repeat.

This cunning loop relies on Mortuary to intercept your sacrifices, turning a graveyard trip straight back into library-top ammo. Shilgengar, Sire of Famine provides the necessary sacrifice outlet to fuel the engine while generating Blood tokens, and since Ornithopter costs zero mana, Gwenom, Remorseless lets you cast it directly from the top of your library for zero life. Because Mortuary immediately recycles Ornithopter every time it hits the graveyard, you can repeat this sequence indefinitely to churn out an endless swarm of death triggers and Blood tokens.