Rionya, Fire Dancer, Dockside Extortionist, and Hellkite Charger

Prerequisites

• Rionya, Fire Dancer on the battlefield
• Dockside Extortionist on the battlefield
• Hellkite Charger on the battlefield
• Opponents control a number of artifacts and/or enchantments equal to or greater than seven divided by one plus the number of instants and sorceries you've cast this turn, rounded up
• An opponent cannot block and kill Hellkite Charger

Steps

1. At the beginning of your combat phase, Rionya triggers, creating at least one token copy of Docksdie Extortionist with haste
2. When the Dockside Extortionist token(s) enter the battlefield, they trigger, creating at least seven Treasure tokens
3. Declare Hellkite Charger as an attacker, triggering its ability
4. Holding priority, activate seven Treasure tokens by tapping and sacrificing them, adding
5. Resolve the Hellkite Charger trigger from step 3, causing you to pay to untap all attacking creatures you control and to get an additional combat phase after this one
6. Repeat each combat phase

Results

• Infinite colored mana
• Infinite combat phases
• Infinite creature tokens with haste
• Infinite ETB
• Infinite Treasure tokens