Kaya the Inexorable + Wormfang Manta + Tocatli Honor Guard + Viscera Seer

Kaya the Inexorable

Wormfang Manta

Tocatli Honor Guard

Viscera Seer

How it works

1. Activate Kaya the Inexorable's first ability by putting a loyalty counter on it, putting a ghostform counter on Wormfang Manta.
2. Activate Viscera Seer by sacrificing Wormfang Manta.
3. When Wormfang Manta dies, its second ability and its ghostform ability trigger.
4. Resolve the ghostform trigger, returning Wormfang Manta from your graveyard to your hand and creating a 1/1 Spirit creature token.
5. Resolve the second trigger, causing you to take an extra turn after this one.
6. Resolve the Viscera Seer ability, causing you to scry 1.
7. Cast Wormfang Manta by paying 5.
8. Wormfang Manta's first ability does not trigger due to Tocatli Honor Guard.
9. Repeat each turn.

This clever loop harnesses the unique downside of Wormfang Manta to bend time itself, sidestepping its enters-the-battlefield trigger entirely thanks to Tocatli Honor Guard keeping those pesky clauses quiet. By utilizing Kaya the Inexorable's ghostform counter, every time you sacrifice the Manta to Viscera Seer, it returns smoothly to your hand while triggering its leaves-the-battlefield ability to grant you an extra turn. Because the Honor Guard suppresses the Manta's self-detonating turn-skip when it re-enters, you can recast it each turn to chain endless extra turns indefinitely.