Breath of Fury + We Ride at Dawn + Mass Hysteria

Prerequisites

• Your commander is on the battlefield.
• Breath of Fury attached to any creature that isn't your commander.
• An opponent cannot block creatures you control

Steps

1. 1Declare your commander and the creature with Breath of Fury attached as attackers.
2. 2We Ride at Dawn's second ability triggers, creating a 1/1 Mercenary 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 Mercenary token, then causing you to untap all creatures you control and to get an additional combat phase after this one.
5. 5Repeat each combat phase.

Effects

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