Kaya the Inexorable + Wormfang Manta + Tocatli Honor Guard + Umbral Collar Zealot

Kaya the Inexorable

Wormfang Manta

Tocatli Honor Guard

Umbral Collar Zealot

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 Umbral Collar Zealot 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 Umbral Collar Zealot ability
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 sequence traps your opponents in an infinite loop of extra turns by weaponizing Wormfang Manta's tricky leave-the-battlefield trigger while bypassing its drawback entirely. The secret lies in Kaya the Inexorable, whose ghostform counter ensures that whenever you sacrifice the Manta to Umbral Collar Zealot, it returns straight to your hand ready to be cast again. Meanwhile, Tocatli Honor Guard acts as a vital static anchor, shutting down the Manta's enter-the-battlefield trigger so you reap the reward of an extra turn without ever suffering the penalty of skipping your own.