Aggravated Assault and Nature's Will on the battlefield.
Lands you control can tap to produce at least ({3} magic symbol) ({R} magic symbol) ({R} magic symbol) .
You control a creature that can attack this turn, and that cannot be blocked by an opponent.
Steps
Deal combat damage to an opponent using any creature.
Nature's Will triggers, tapping all lands the defending opponent controls and untapping all lands you control.
Move to your postcombat main phase.
Activate all mana-producing lands you control by tapping them, adding at least ({3} magic symbol) ({R} magic symbol) ({R} magic symbol) .
Activate Aggravated Assault by paying ({3} magic symbol) ({R} magic symbol) ({R} magic symbol) , causing you to untap all creatures you control and to get an additional combat phase after this one.