Charnelhoard Wurm, Savage Ventmaw, and Relentless Assault

Prerequisites

• Charnelhoard Wurm on the battlefield
• Savage Ventmaw on the battlefield
• Relentless Assault in the graveyard
• Savage Ventmaw and Charnelhoard Wurm do not have summoning sickness, and cannot be blocked by an opponent

Steps

1. Declare Charnelhoard Wurm and Savage Ventmaw as attackers
2. Savage Ventmaw triggers, adding
3. Deal combat damage to an opponent using Charnelhoard Wurm
4. Charnelhoard Wurm triggers, returning Relentless Assault from your graveyard to your hand
5. Cast Relentless Assault by paying , causing you to untap all creatures that attacked this turn and to get an additional combat and main phase after this one
6. Repeat

Results

• Infinite combat damage
• Infinite combat phases
• Infinite green mana
• Infinite magecraft triggers
• Infinite red mana
• Infinite storm count