Grub, Storied Matriarch // Grub, Notorious Auntie, Combat Celebrant, and Dragonlord Kolaghan

Prerequisites

• Grub, Storied Matriarch // Grub, Notorious Auntie on the battlefield
• Combat Celebrant on the battlefield
• Dragonlord Kolaghan on the battlefield

Steps

1. Declare Grub and Combat Celebrant as attackers, choosing to exert Combat Celebrant as it attacks
2. Grub and Combat Celebrant trigger
3. Resolve the Grub trigger, putting a -1/-1 counter on Combat Celebrant and then creating a tapped and attacking token copy of it
4. Combat Celebrant dies as a state-based action due to having 0 toughness
5. Resolve the Combat Celebrant trigger, causing you to untap all other creatures you control and causing you to get an additional combat phase after this one
6. Repeat each combat phase, using the Combat Celebrant token instead

Results

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