Breath of Fury + Hammer of Purphoros + Maestros Diabolist

Prerequisites

• An opponent cannot block creatures you control.
• You don't control a Devil token.

Steps

1. 1Declare the creature with Breath of Fury attached and Maestros Diabolist as attackers.
2. 2Maestros Diabolist triggers, creating a creature token.
3. 3Deal combat damage using the creature that has Breath of Fury attached.
4. 4Breath 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. 5If the sacrificed creature was a Devil token, it triggers when it dies, dealing 1 damage to any target.
6. 6Repeat each combat phase.

Effects

• Infinite combat damage
• Infinite combat phases
• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite damage
• Infinite death triggers
• Infinite mana creatures you control can produce
• Infinite untap of creatures you control