Breath of Fury, Tana, the Bloodsower, and The Fire Crystal

Prerequisites

• Breath of Fury on the battlefield
• Tana, the Bloodsower on the battlefield
• The Fire Crystal on the battlefield

Steps

1. Deal combat damage using the creature that has Breath of Fury attached and Tana, triggering Breath of Fury and Tana
2. Resolve the Tana trigger, creating at least one creature token
3. Resolve the Breath of Fury trigger, causing you to sacrifice the creature it is attached to, then attach Breath of Fury to a creature 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 sacrifice triggers
• Infinite untap of creatures you control
• Infinite ETB
• Infinite LTB
• Infinite combat damage
• Infinite combat phases
• Infinite creature tokens with haste
• Infinite death triggers
• Infinite mana creatures you control can produce