Breath of Fury, Grave Titan, and Urabrask the Hidden

Prerequisites

• Breath of Fury on the battlefield
• Grave Titan on the battlefield
• Urabrask the Hidden on the battlefield
• Breath of Fury attached to any other creature you control
• An opponent cannot block creatures you control

Steps

1. Declare Grave Titan and the creature with Breath of Fury attached as attackers
2. Grave Titan triggers, creating two 2/2 Zombie creature tokens
3. Deal combat damage using the creature that has 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 a Zombie token, then causing you to untap all creatures you control and to 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
• Infinite creature tokens with haste