Hellkite Charger, and Iroh, Dragon of the West

Prerequisites

• Hellkite Charger on the battlefield
• Iroh, Dragon of the West on the battlefield
• available

Steps

1. At the beginning of your combat phase, Iroh triggers, giving Hellkite Charger firebending 2 until end of turn
2. Declare Hellkite Charger as an attacker, triggering its innate ability and each instance of firebending it has
3. Resolve all firebending triggers, adding for each trigger
4. Resolve the other Hellkite Charger trigger, causing you to pay to untap all attacking creatures you control and get an additional combat phase after this one
5. Repeat each combat phase

Results

• Infinite combat phases
• Infinite red mana