Soul of Windgrace, Waves of Aggression, and Savage Ventmaw

Prerequisites

• Soul of Windgrace on the battlefield
• Waves of Aggression in the graveyard
• Savage Ventmaw on the battlefield
• An opponent cannot block and kill Savage Ventmaw or Soul of Windgrace
• Savage Ventmaw and Soul of Windgrace do not have summoning sickness
• You have at least one land card in your graveyard

Steps

1. Declare Savage Ventmaw and Soul of Windgrace as attackers, triggering their abilities
2. Resolve the Savage Ventmaw trigger, adding
3. Resolve the Soul of Windgrace trigger, returning a land card from your graveyard to the battlefield tapped
4. Move to your postcombat main phase
5. Cast Waves of Aggression from your graveyard for its retrace cost by paying and discarding a land card, 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 phases
• Infinite green mana
• Infinite magecraft triggers
• Infinite red mana
• Infinite self-discard triggers
• Infinite storm count