Jinnie Fay, Jetmir's Second, Breath of Fury, and Decadent Dragon // Expensive Taste

Prerequisites

• Jinnie Fay, Jetmir's Second on the battlefield
• Breath of Fury on the battlefield
• Decadent Dragon // Expensive Taste on the battlefield
• Breath of Fury attached to another creature you control that can attack this turn
• An opponent cannot block creatures you control
• Decadent Dragon does not have summoning sickness

Steps

1. Declare the creature with Breath of Fury attached and Decadent Dragon as attackers
2. Decadent Dragon triggers, creating a 2/2 Cat creature token with haste due to Jinnie Fay
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 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 death triggers
• Infinite ETB
• Infinite LTB
• Infinite mana creatures you control can produce
• Infinite sacrifice triggers
• Infinite untap of creatures you control