Hellkite Charger, and Luxurious Locomotive

Prerequisites

• Hellkite Charger on the battlefield
• Luxurious Locomotive on the battlefield
• You control at least seven other creatures with total power 1 or greater
• An opponent cannot block and kill Hellkite Charger or Luxurious Locomotive

Steps

1. Activate Luxurious Locomotive's crew ability by tapping seven 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 Hellkite Charger as attackers, triggering their abilities
3. Resolve the Luxurious Locomotive trigger, creating at least seven Treasure tokens
4. Holding priority, activate seven Treasures by tapping and sacrificing them, adding
5. Resolve the Hellkite Charger trigger, causing you to pay to untap all attacking creatures you control and to get an additional combat phase after this one
6. Repeat from step 2 each combat phase

Results

• Infinite colored mana
• Infinite combat phases
• Infinite Treasure tokens