Kaya the Inexorable + Wormfang Manta + Tocatli Honor Guard + Phyrexian Altar

Kaya the Inexorable

Wormfang Manta

Tocatli Honor Guard

Phyrexian Altar

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 Phyrexian Altar by sacrificing Wormfang Manta, adding .
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. Cast Wormfang Manta by paying 5.
7. Wormfang Manta's first ability does not trigger due to Tocatli Honor Guard.
8. Repeat each turn.

By letting Kaya the Inexorable place a ghostform counter on Wormfang Manta, you set up an infinite loop of recursion each time you sacrifice the Manta to Phyrexian Altar. Normally, Wormfang Manta's entry trigger would force you to skip your turn, but Tocatli Honor Guard elegantly mutes that drawback so you only reap the reward of its leaves-the-battlefield trigger when it dies. Because the ghostform counter returns the Manta straight to your hand alongside creating a Spirit token, you have all the pieces needed to recast the Manta every single turn without ever losing momentum.