Altaïr Ibn-La'Ahad, Éomer, Marshal of Rohan, Gogo, Mysterious Mime, and Rukarumel, Biologist

Prerequisites

• Altaïr Ibn-La'Ahad on the battlefield
• Éomer, Marshal of Rohan in the graveyard
• Gogo, Mysterious Mime on the battlefield
• Rukarumel, Biologist on the battlefield

Steps

1. At the beginning of your combat phase, Gogo triggers, causing it to become a copy of Altaïr with its name not changing, and causing both Gogo and Altaïr to get +2/+0 and haste until end of turn
2. Declare Gogo and Altaïr as attackers, triggering their abilities
3. Resolve the Altaïr trigger, exiling Éomer from your graveyard with a memory counter on it and creating a tapped and attacking copy of Éomer
4. Resolve the Godo trigger, creating a tapped and attacking copy of Éomer
5. Put either Éomer token into your graveyard due to the legend rule, triggering the other Éomer token, causing you to untap all creatures you control and to get an additional combat phase after this one
6. At the end of your combat phase, Altaïr triggers, causing you to exile the Éomer token
7. Repeat from step 2 each combat phase

Results

• Infinite LTB
• Infinite ETB
• Infinite death triggers
• Infinite combat phases
• Infinite untap of creatures you control
• Infinite mana creatures you control can produce