Tetzin, Gnome Champion // The Golden-Gear Colossus, Breath of Fury, and Urabrask the Hidden

Prerequisites

• Tetzin, Gnome Champion // The Golden-Gear Colossus on the battlefield
• Breath of Fury on the battlefield
• Urabrask the Hidden on the battlefield
• Breath of Fury attached to another creature you control
• An opponent cannot block creatures you control

Steps

1. Declare the creature with Breath of Fury attached and The Golden-Gear Colossus as attackers
2. The Golden-Gear Colossus triggers, transforming up to one double-faced artifact you control and creating two 1/1 Gnome artifact creature tokens
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 a Gnome 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
• Transform any number of double-faced artifacts you control
• Infinite creature tokens with haste