Saheeli, the Sun's Brilliance, and Combat Celebrant

Prerequisites

• Saheeli, the Sun's Brilliance on the battlefield
• Combat Celebrant on the battlefield

Steps

1. Activate any number of creatures by tapping them, adding at least
2. Activate Saheeli by paying and tapping it, creating a token copy of Combat Celebrant with haste
3. Declare the Combat Celebrant token as an attacker, choosing to exert it as it attacks
4. The token triggers, untapping all other creatures you control and causing you to get an additional combat phase after this one
5. Repeat

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