Impostor Syndrome + Aurelia, the Warleader

Prerequisites

• An opponent cannot block and kill Aurelia.
• An opponent cannot block creatures you control.

Steps

1. 1Declare Aurelia as an attacker, triggering its ability, causing you to untap all creatures you control and to get an additional combat phase after this one.
2. 2Deal combat damage to an opponent using Aurelia, triggering Impostor Syndrome, creating a token copy of Aurelia that isn't legendary.
3. 3During your next combat phase, declare Aurelia and the Aurelia token as attackers.
4. 4The Aurelia token triggers, causing you to untap all creatures you control and to get an additional combat phase after this one.
5. 5Repeat from step 2.

Effects

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