Mortuary + Cauldron Familiar + Goblin Bombardment + Gwenom, Remorseless

Mortuary

Cauldron Familiar

Goblin Bombardment

Gwenom, Remorseless

How it works

1. Cast Cauldron Familiar either from your hand or from the top of your library by paying or 1 life respectively.
2. When Cauldron Familiar enters, it triggers, causing each opponent to lose 1 life and you to gain 1 life.
3. Activate Goblin Bombardment by sacrificing Cauldron Familiar.
4. When Cauldron Familiar dies, Mortuary triggers, putting Cauldron Familiar from your graveyard onto the top of your library.
5. Resolve the Goblin Bombardment ability.
6. Repeat.

This loop turns a humble cat into an infinite damage engine by constantly recycling it between the battlefield, graveyard, and the top of your library. When you sacrifice Cauldron Familiar to Goblin Bombardment, Mortuary steps in to catch it, immediately placing the cat back on top of your library instead of letting it rest in the graveyard. From there, Gwenom, Remorseless lets you bypass traditional mana costs by paying life instead, allowing you to recast Cauldron Familiar straight off the top of your library over and over again. Every single time it enters the battlefield, Cauldron Familiar triggers its life-drain ability to easily offset the life you spend casting it with Gwenom, Remorseless, creating an unstoppable feedback loop of endless sacrifices, life loss, and triggers.