Grand Warlord Radha, Hellkite Charger, and Savage Ventmaw

Prerequisites

• Grand Warlord Radha on the battlefield
• Hellkite Charger on the battlefield
• Savage Ventmaw on the battlefield
• Savage Ventmaw does not have summoning sickness
• An opponent is unable to block and kill your creatures

Steps

1. Declare Radha, Hellkite Charger and Savage Ventmaw as attackers
2. Radha, Savage Ventmaw and Hellkite Charger trigger
3. Resolve the Savage Ventmaw trigger, adding
4. Resolve the Radha trigger, adding at least
5. Resolve the Hellkite Charger trigger, choosing to pay to untap all attacking creatures and to get an additional combat phase after this one
6. Repeat

Results

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