Luxurious Locomotive, Ruthless Technomancer, Combat Celebrant, and Ashnod's Altar

Prerequisites

• Luxurious Locomotive on the battlefield
• Ruthless Technomancer on the battlefield
• Combat Celebrant on the battlefield
• Ashnod's Altar on the battlefield

Steps

1. Activate Luxurious Locomotive's crew ability by tapping five creatures you control with total power 1 or greater, causing Luxurious Locomotive to become an artifact creature until end of turn
2. Declare Luxurious Locomotive and Combat Celebrant as attackers, choosing to exert Combat Celebrant as it attacks, triggering their abilities
3. Resolve the Luxurious Locomotive trigger, creating at least five Treasure tokens
4. Resolve the Combat Celebrant trigger, untapping all other creatures you control and causing you to get an additional combat phase after this one
5. Holding priority, activate Ashnod's Altar by sacrificing Combat Celebrant, adding
6. Activate a Treasure by tapping and sacrificing it, adding
7. Activate Ruthless Technomancer by paying and sacrificing four Treasures, returning Combat Celebrant from your graveyard to the battlefield
8. Repeat from step 2 each combat phase

Results

• Infinite LTB
• Infinite ETB
• Infinite colored mana
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite colorless mana
• Infinite combat phases
• Infinite untap of creatures you control
• Infinite Treasure tokens