Ancient Adamantoise + Gravewaker + Umbral Collar Zealot + Archelos, Lagoon Mystic

Ancient Adamantoise

Gravewaker

Umbral Collar Zealot

Archelos, Lagoon Mystic

How it works

1. Activate Umbral Collar Zealot by sacrificing Ancient Adamantoise.
2. When Ancient Adamantoise dies, it triggers.
3. Holding priority, activate Gravewaker by paying 5, returning Ancient Adamantoise from your graveyard to the battlefield.
4. Resolve the Ancient Adamantoise trigger, creating ten Treasure tokens that enter untapped due to Archelos.
5. Resolve the Umbral Collar Zealot ability.
6. Activate seven Treasures by tapping and sacrificing them, adding 5.
7. Repeat.

This loop transforms the heavy damage redirection of Ancient Adamantoise into an engine of endless rebirth by using Gravewaker to pull it straight back from the graveyard for a profit. To pull this off, you sacrifice the turtle to Umbral Collar Zealot, triggering its explosive death ability while holding priority to reactivate its return. Meanwhile, Archelos, Lagoon Mystic shapes the physics of the battlefield so that the resulting bounty arrives ready to use immediately. By cracking just seven of the resulting ten Treasure tokens, you generate more than enough mana to feed Gravewaker's activation cost all over again, leaving you with an infinite surplus of mana, artifacts, and triggers.