Éomer, Marshal of Rohan + Altaïr Ibn-La'Ahad + Umbral Collar Zealot + Conspiracy

Éomer, Marshal of Rohan

Altaïr Ibn-La'Ahad

Umbral Collar Zealot

Conspiracy

How it works

1. Declare Altaïr as an attacker. Altaïr triggers, exiling Éomer from your graveyard with a memory counter on it, and then creating a tapped and attacking token copy of each card you own that is exiled with a memory counter on it.
2. Activate Umbral Collar Zealot by sacrificing another legendary creature token except Éomer.
3. When the creature dies, Éomer triggers, untapping all creatures you control and causing you to get an additional combat phase after this one.
4. Resolve the Umbral Collar Zealot ability.
5. Repeat during each combat phase.

This brilliant loop turns your entire deck into a ceaseless army of legends by transforming every piece into an engine of war through Conspiracy, which names "Assassin" to ensure all your creatures match Altaïr Ibn-La'Ahad's tribe. When Altaïr attacks, he floods the board with tapped and attacking token copies from exile—specifically bringing back Éomer, Marshal of Rohan over and over. You then feed one of those token copies to Umbral Collar Zealot, which conveniently triggers Éomer's static haste and his death ability to untap your board and grant you an endless cascade of additional combat phases.