Havengul Lich + Grimgrin, Corpse-Born + Relic of Legends + Zahur, Glory's Past

Havengul Lich

Grimgrin, Corpse-Born

Relic of Legends

Zahur, Glory's Past

How it works

1. Activate Relic of Legends's last ability 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. When that creature dies, Zahur triggers, creating a creature token or a token that adds mana.
4. If you created a creature token, repeat steps 1 and 2 to sacrifice that token and add an additional mana.
5. If you created a token that adds mana, instead activate that token to add mana.
6. Activate Havengul Lich by paying 1, allowing you to cast the sacrificed creature from your graveyard this turn.
7. Cast that creature from your graveyard by paying one mana.
8. Repeat.

This fascinating engine transforms your graveyard into a recursive loop by utilizing Havengul Lich's ability to repeatedly cast a creature for a single mana. Grimgrin, Corpse-Born acts as the ultimate sacrifice outlet, devouring that resurrected creature to fuel its own growth and untap itself for the next iteration. Meanwhile, Relic of Legends capitalizes on Grimgrin's legendary status to generate mana upon being tapped, and Zahur, Glory's Past keeps the cycle supplied with fresh fodder by churning out Zombie tokens whenever your nontoken creatures perish at max speed.