Radha, Heir to Keld, Savage Ventmaw, and Hellkite Charger

Prerequisites

• Radha, Heir to Keld on the battlefield
• Savage Ventmaw on the battlefield
• Hellkite Charger on the battlefield
• Radha and Savage Ventmaw do not have summoning sickness
• An opponent cannot block and kill Radha, Savage Ventmaw or Hellkite Charger

Steps

1. Declare Radha, Savage Ventmaw and Hellkite Charger as attackers, triggering their abilities
2. Resolve the Radha trigger, adding
3. Resolve the Savage Ventmaw trigger, adding
4. Resolve the Hellkite Charger trigger, causing you to pay to untap all attacking creatures and to get an additional combat phase after this one
5. Repeat each combat phase

Results

• Infinite combat phases
• Infinite green mana
• Infinite red mana