Havengul Lich + Grimgrin, Corpse-Born + Molten Echoes + Utopia Vow

Havengul Lich

Grimgrin, Corpse-Born

Molten Echoes

Utopia Vow

How it works

1. Activate Grimgrin's ability from Utopia Vow by tapping Grimgrin, adding one mana.
2. Activate Grimgrin by sacrificing the creature castable for one mana, untapping Grimgrin and putting a +1/+1 counter on it.
3. Activate Grimgrin's ability from Utopia Vow by tapping Grimgrin, adding one mana.
4. Activate Havengul Lich by paying 1, allowing you to cast the creature castable for one mana from your graveyard this turn.
5. Cast that creature spell from your graveyard by paying it mana cost.
6. When you cast that creature or when it enters, Molten Echoes triggers, creating a creature token.
7. Activate Grimgrin by sacrificing the creature token, untapping Grimgrin and putting a +1/+1 counter on it.
8. Repeat.

This intricate necromantic loop turns Grimgrin, Corpse-Born into a self-sustaining sacrifice engine by grafting a mana-producing ability onto him via Utopia Vow. To feed Grimgrin's hunger without running out of sacrifices, Havengul Lich steps in to repeatedly pull creatures from your graveyard, while Molten Echoes multiplies those returning souls by automatically churning out hasty token copies whenever a creature of the chosen type enters the battlefield. Through this endless cycle of sacrifice, casting, and duplication, you generate infinite creature triggers and tower over the board with an infinitely large zombie giant.