Breath of Fury + Impostor Syndrome

UR identity

Commander legal

The 2 combo pieces

• Breath of Fury
• Impostor Syndrome

What must be in place

You control a nontoken creature that has haste and that does not have Breath of Fury attached to it.
An opponent cannot block creatures you control.

How to execute it

1. Deal combat damage to an opponent using the nontoken creature that has haste and the creature that has Breath of Fury attached.
2. Breath of Fury and Impostor Syndrome trigger.
3. Resolve the Impostor Syndrome trigger, creating a token copy of the nontoken creature with haste that isn't legendary.
4. Resolve the Breath of Fury trigger, sacrificing the creature it is attached to and attaching it to the creature token created in step 3, then untapping all creatures you control and causing you to get an additional combat phase after this one.
5. Repeat each combat phase.

What the combo produces

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