Breath of Fury, Guildless Commons, and Walking Atlas

Prerequisites

• Breath of Fury on the battlefield
• Guildless Commons in hand
• Walking Atlas on the battlefield

Steps

1. Activate Walking Atlas by tapping it, putting Guildless Commons from your hand onto the battlefield
2. Guildless Commons enters the battlefield, triggering itself and [[Permanent with Landfall Ability|Landfall Girl]]
3. Resolve the Guildless Commons trigger, returning it from the battlefield to your hand
4. Resolve the [[Landfall Girl]] trigger, creating a creature token
5. Deal combat damage to an opponent with the creature that has Breath of Fury attached
6. Breath of Fury triggers, causing you to sacrifice the creature it is attached to and then attach Breath of Fury to the creature token from step 4, untap all creatures you control, and get an additional combat phase after this one
7. Repeat each combat phase

Results

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