Aurelia, the Warleader, Adarkar Valkyrie, and Goblin Bombardment

Prerequisites

• Aurelia, the Warleader on the battlefield
• Adarkar Valkyrie on the battlefield
• Goblin Bombardment on the battlefield

Steps

1. Declare Aurelia as an attacker
2. Aurelia triggers, causing you to untap all creatures you control and to get an additional combat phase after this one
3. Holding priority, activate Adarkar Valkyrie by tapping it, making it so the next time Aurelia dies this turn it will be returned to the battlefield
4. Activate Goblin Bombardment by sacrificing Aurelia
5. Adarkar Valkyrie triggers, returning Aurelia to the battlefield
6. Resolve the Goblin Bombardment's ability, dealing 1 damage to any target
7. Repeat

Results

• Infinite combat phases
• Infinite damage
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite untaps of creatures you control