Havengul Lich + Grimgrin, Corpse-Born + Genesis Chamber + Enduring Vitality

Havengul Lich

Grimgrin, Corpse-Born

Genesis Chamber

Enduring Vitality

How it works

1. Activate Grimgrin's ability from Enduring Vitality 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 Enduring Vitality 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, Genesis Chamber 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 fascinating loop lets Grimgrin, Corpse-Born grow infinitely large and trigger endless sacrifices by recycling a creature from your graveyard with Havengul Lich. Enduring Vitality is the engine's linchpin, granting Grimgrin the tap ability needed to generate the exact mana required to pay for the Lich's activation. Meanwhile, Genesis Chamber ensures you always have a ready supply of Myr tokens to sacrifice whenever a fresh creature enters the battlefield.