Altaïr Ibn-La'Ahad, Éomer, Marshal of Rohan, Goblin Bombardment, and Roshan, Hidden Magister

Prerequisites

• Altaïr Ibn-La'Ahad on the battlefield
• Éomer, Marshal of Rohan in the graveyard
• Goblin Bombardment on the battlefield
• Roshan, Hidden Magister on the battlefield

Steps

1. Declare Altaïr as an attacker
2. 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
3. Activate Goblin Bombardment by sacrificing another legendary creature token except Éomer
4. When the creature dies, Éomer triggers, untapping all creatures you control and causing you to get an additional combat phase after this one
5. Resolve the Goblin Bombardment ability
6. Repeat during each combat phase

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite damage
• Infinite combat phases