Soul of Windgrace + Waves of Aggression + Grand Warlord Radha + Gruul Turf

Soul of Windgrace

Waves of Aggression

Grand Warlord Radha

Gruul Turf

How it works

1. Declare Grand Warlord Radha and Soul of Windgrace as attackers.
2. When they attack, Grand Warlord Radha and Soul of Windgrace trigger.
3. Resolve the Grand Warlord Radha trigger, adding at least five mana that you will not lose this turn as steps and phases end.
4. Resolve the Soul of Windgrace trigger, returning Gruul Turf from your graveyard to the battlefield tapped.
5. When Gruul Turf 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 3R/WR/W and discarding Gruul Turf, causing you to untap all creatures that attacked this turn, and to get an additional combat and main phase after this one.
7. Repeat.