Jolrael and Aggravated Assault on the battlefield.
Lands and/or creatures you control that do not have summoning sickness can tap to produce at least ({3} magic symbol) ({R} magic symbol) ({R} magic symbol) .
You have at least two cards in hand.
Jolrael does not have summoning sickness.
({2} magic symbol) ({G} magic symbol) available.
Steps
Activate Jolrael by paying ({2} magic symbol) ({G} magic symbol) , tapping it and discarding two cards, causing all lands you control to become 3/3 creatures in addition to their other types until end of turn.
Activate all mana-producing lands and/or creatures 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) , untapping all creatures you control and causing you to get an additional combat and main phase after this one.
Repeat from step 2.
If lands and/or creatures you control can tap to produce at least ({4} magic symbol) ({R} magic symbol) ({R} magic symbol) , this combo nets infinite mana.