Luxurious Locomotive, Ruthless Technomancer, Combat Celebrant, and Phyrexian Altar

Prerequisites

• Luxurious Locomotive on the battlefield
• Ruthless Technomancer on the battlefield
• Combat Celebrant on the battlefield
• Phyrexian Altar on the battlefield

Steps

1. Activate Luxurious Locomotive's crew ability by tapping six 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 six 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 Phyrexian Altar by sacrificing Combat Celebrant, adding
6. Activate two Treasures by tapping and sacrificing them, 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 combat phases
• Infinite untap of creatures you control
• Infinite mana creatures you control can produce
• Infinite Treasure tokens