Breath of Fury, Leonin Warleader, and Roar of Resistance

Prerequisites

• Breath of Fury on the battlefield
• Leonin Warleader on the battlefield
• Roar of Resistance on the battlefield
• Leonin Warleader does not have summoning sickness
• Breath of Fury attached to any other creature you control that does not have summoning sickness
• An opponent cannot block creatures you control

Steps

1. Declare Leonin Warleader and the creature with Breath of Fury attached as attackers
2. Leonin Warleader triggers, creating two 1/1 Cat 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 Cat 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 creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite mana creatures you control can produce
• Infinite sacrifice triggers
• Infinite untap of creatures you control