Kaya the Inexorable + Wormfang Manta + Tocatli Honor Guard + Goblin Bombardment

Kaya the Inexorable

Wormfang Manta

Tocatli Honor Guard

Goblin Bombardment

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 Goblin Bombardment 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 Goblin Bombardment ability, dealing 1 damage to any target.
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 loop harnesses the bizarre interaction of Wormfang Manta leaving the battlefield to take extra turns, cleverly bypassing its normally punishing downside by letting Tocatli Honor Guard muzzle its entering-the-battlefield trigger entirely. To facilitate this sacrifice loop on command, Goblin Bombardment converts the Manta into direct damage while sending it to the graveyard. Meanwhile, Kaya the Inexorable steps in with her +1 ability to continuously tag the Manta with a ghostform counter, ensuring it safely bounces right back to your hand for another casting.