Breath of Fury, Yore-Tiller Nephilim, and Urabrask the Hidden

Prerequisites

• Breath of Fury on the battlefield
• Yore-Tiller Nephilim on the battlefield
• Urabrask the Hidden on the battlefield
• Breath of Fury attached to another nontoken creature you control
• An opponent cannot block creatures you control
• You control an additional creature, or have a creature card in your graveyard

Steps

1. Declare the creature with Breath of Fury attached and Yore-Tiller Nephilim as attackers
2. Yore-Tiller Nephilim triggers, returning a creature card from your graveyard to the battlefield tapped and attacking
3. Deal combat damage to an opponent using the creature with Breath of Fury attached
4. Breath of Fury triggers, causing you to sacrifice the creature it is attached to, then attach Breath of Fury to another creature, untap all creatures you control and get an additional combat phase after this one
5. Repeat each combat phase

Results

• 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