Mortuary + Bile Urchin + Moonlit Wake + Gwenom, Remorseless

Mortuary

Bile Urchin

Moonlit Wake

Gwenom, Remorseless

How it works

1. Activate Bile Urchin by sacrificing it.
2. When Bile Urchin dies, Mortuary and Moonlit Wake trigger.
3. Resolve the Mortuary trigger, putting Bile Urchin from your graveyard onto the top of your library.
4. Resolve the Moonlit Wake trigger, causing you to gain 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 an engine of endless attrition by leaning on the top-deck manipulation of Gwenom, Remorseless. When you activate Bile Urchin, sacrificing it triggers Moonlit Wake to regain the life you'll need, while Mortuary quietly catches the creature and slides it right back onto the top of your library. From there, the attack-based permission granted by Gwenom, Remorseless lets you immediately recast the sacrificed Bile Urchin directly from the top of your library by paying life instead of its mana cost.