Hellkite Charger, and Sun Warriors

Prerequisites

• Hellkite Charger on the battlefield
• Sun Warriors on the battlefield

Steps

1. Declare Hellkite Charger and Sun Warriors as attackers, triggering each of their abilities
2. Resolve the Sun Warrior trigger, adding for each creature you control
3. Resolve the Hellkite Charger trigger, causing you to pay to untap all attacking creatures and to get an additional combat phase after this one
4. Repeat each combat phase

Results

• Infinite combat phases
• Infinite red mana