Breath of Fury, Lord Skitter, Sewer King, and Fervor

Prerequisites

• Breath of Fury on the battlefield
• Lord Skitter, Sewer King on the battlefield
• Fervor on the battlefield
• Breath of Fury attached to another creature you control that can attack this turn
• An opponent cannot block creatures you control

Steps

1. At the beginning of your combat phase, Lord Skitter's second ability triggers, creating a 1/1 Rat creature token
2. When the Rat enters the battlefield, Lord Skitter's first ability triggers, exiling up to one card from an opponent's graveyard
3. Deal combat damage to an opponent using the creature with Breath of Fury attached
4. Breath of Fury triggers, causing you to sacrifice the creature with Breath of Fury attached, then attach Breath of Fury to the Rat token, untap all creatures you control and to get an additional combat phase after this one
5. Repeat each combat phase

Results

• Exile each opponent's graveyard
• 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