Breath of Fury, Garna, the Bloodflame, and Razorkin Hordecaller

Prerequisites

• Breath of Fury on the battlefield
• Garna, the Bloodflame on the battlefield
• Razorkin Hordecaller on the battlefield

Steps

1. Declare the creature with Breath of Fury attached and Razorkin Hordecaller as attackers
2. Razorkin Hordecaller triggers, creating a creature token
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 the creature 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 ETB
• Infinite LTB
• Infinite combat damage
• Infinite combat phases
• Infinite death triggers
• Infinite mana creatures you control can produce
• Infinite sacrifice triggers
• Infinite untap of creatures you control