Phantom Steed + Godo, Bandit Warlord + Lumbering Battlement + Xenograft + Fervor

Phantom Steed

Godo, Bandit Warlord

Lumbering Battlement

Xenograft

Fervor

How it works

1. Declare Phantom Steed and Godo as attackers, triggering their abilities.
2. Resolve the Godo trigger, untapping all creatures you control and causing you to get an additional combat phase after this one.
3. Resolve the Phantom Steed trigger, creating a token copy of Lumbering Battlement.
4. The token Lumbering Battlement enters the battlefield, exiling Godo until Lumbering Battlement leaves the battlefield.
5. At the end of your combat phase, the token Lumbering Battlement triggers, causing you to sacrifice it.
6. The token Lumbering Battlement leaves the battlefield, returning Godo from exile to the battlefield.
7. Repeat each combat phase.

This intricate looping engine harnesses Xenograft to turn your entire board into Samurai, allowing Godo, Bandit Warlord's combat-untap trigger to endlessly refresh your forces alongside Fervor granting the necessary haste. When Phantom Steed attacks, it conjures a token copy of Lumbering Battlement that promptly exiles Godo, only to return him when the token is sacrificed at the end of combat. Because Xenograft also makes Phantom Steed a Samurai, Godo untaps it right along with everyone else for the next assault, while Lumbering Battlement's entry continuously tutors out every Equipment card in your library.