Soul of Windgrace, Waves of Aggression, Savage Ventmaw, and Selesnya Sanctuary

Prerequisites

• Soul of Windgrace on the battlefield
• Waves of Aggression in the graveyard
• Savage Ventmaw on the battlefield
• Selesnya Sanctuary in the graveyard

Steps

1. Declare Savage Ventmaw and Soul of Windgrace as attackers
2. When they attack, Savage Ventmaw and Soul of Windgrace trigger
3. Resolve the Savage Ventmaw trigger, adding six mana that you will not lose this turn as steps and phases end
4. Resolve the Soul of Windgrace trigger, returning Selesnya Sanctuary from your graveyard to the battlefield tapped
5. When Selesnya Sanctuary enters, it triggers, returning itself from the battlefield to your hand
6. In your next main phase, cast Waves of Aggression from your graveyard for its retrace cost by paying and discarding Selesnya Sanctuary, causing you to untap all creatures that attacked this turn, and to get an additional combat and main phase after this one
7. Repeat

Results

• Infinite combat phases
• Infinite landfall triggers
• Infinite magecraft triggers
• Infinite self-discard triggers
• Infinite storm count
• Infinite untap of most creatures you control
• Infinite green mana
• Infinite red mana