Kaya the Inexorable + Wormfang Manta + Torpor Orb + Phyrexian Altar

Kaya the Inexorable

Wormfang Manta

Torpor Orb

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 Torpor Orb.
8. Repeat each turn.

This brilliant loop takes advantage of Wormfang Manta's unique delayed trigger by turning its downside into an engine for infinite turns. Normally, casting the Manta makes you skip your next turn, but Torpor Orb steps in to completely silence that entering-the-battlefield trigger, letting the creature sneak onto the board safely. Once it's there, Kaya the Inexorable prepares the loop by placing a ghostform counter on the Manta, ensuring that when you sacrifice it to Phyrexian Altar for mana, it returns straight to your hand while triggering an extra turn. Because Torpor Orb keeps the entering penalty turned off every time you replay the Manta, you bypass the skipped turns entirely and secure an infinite sequence of your own.