Breath of Fury, Adeline, Resplendent Cathar, and The Fire Crystal

Prerequisites

• Breath of Fury on the battlefield
• Adeline, Resplendent Cathar on the battlefield
• The Fire Crystal on the battlefield

Steps

1. Declare the creature with Breath of Fury attached and Adeline as attackers
2. Adeline 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 mana creatures you control can produce
• Infinite combat damage
• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite combat phases
• Infinite untap of creatures you control
• Infinite creature tokens with haste
• Infinitely powerful creature