Breath of Fury, Urabrask the Hidden, and Scepter of Celebration

Prerequisites

• Breath of Fury on the battlefield
• Urabrask the Hidden on the battlefield
• Scepter of Celebration on the battlefield

Steps

1. Deal combat damage using the creature that has Breath of Fury attached and the creature that has Scepter of Celebration attached, triggering Breath of Fury and Scepter of Celebration
2. Resolve the Scepter of Celebration trigger, creating a number of 1/1 Citizen creature tokens
3. Resolve the Breath of Fury trigger, causing you to sacrifice the creature it is attached to, then attach Breath of Fury to a Citizen token, then causing you to untap all creatures you control and to get an additional combat phase after this one
4. Repeat each combat phase

Results

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