Combat Celebrant, Stolen Identity, and Urabrask the Hidden

Prerequisites

• Combat Celebrant on the battlefield
• Stolen Identity in exile
• Urabrask the Hidden on the battlefield
• An opponent cannot block the creature with Stolen Identity encoded and Combat Celebrant

Steps

1. Declare Combat Celebrant and the creature with Stolen Identity encoded as attackers, choosing to exert Combat Celebrant as it attacks
2. Combat Celebrant triggers, untapping all other creatures you control and to get an additional combat phase after this one
3. Deal combat damage to an opponent using the creature that has Stolen Identity encoded
4. Stolen Identity triggers, casting a copy of itself without paying its mana cost
5. Resolve Stolen Identity, creating a token copy of Combat Celebrant
6. Repeat each combat phase using the Combat Celebrant token instead

Results

• Infinite combat damage
• Infinite combat phases
• Infinite ETB
• Infinite LTB
• Infinite magecraft triggers
• Infinite mana creatures you control can produce
• Infinite storm count
• Infinite untap of creatures you control