Mortuary + Zulaport Cutthroat + Bile Urchin + Gwenom, Remorseless

Mortuary

Zulaport Cutthroat

Bile Urchin

Gwenom, Remorseless

How it works

1. Activate Bile Urchin by sacrificing it.
2. When Bile Urchin dies, Mortuary and Zulaport Cutthroat trigger.
3. Resolve the Mortuary trigger, putting Bile Urchin from your graveyard onto the top of your library.
4. Resolve the Zulaport Cutthroat trigger, causing you to gain 1 life and each opponent to lose 1 life.
5. Resolve the Bile Urchin ability.
6. Cast Bile Urchin from the top of your library by paying 1 life.
7. Repeat.

This clever loop turns a humble goblin into a self-sustaining engine by letting Gwenom, Remorseless peer into your library and cast spells straight off the top. When you sacrifice Bile Urchin to drain an opponent, Mortuary immediately catches it on its way to the graveyard and slides it right back onto the top of your library. From there, Gwenom, Remorseless lets you recast the Urchin by paying life instead of mana, and Zulaport Cutthroat ensures that every single iteration of this cycle drains your opponents while easily offsetting the life you spent to cast the Urchin.