Cast Surge to Victory by paying ({4} magic symbol) ({R} magic symbol) ({R} magic symbol) , exiling Ephemerate from your graveyard and giving creatures you control +1/+0 until end of turn.
Declare Aurelia as an attacker.
Aurelia triggers, untapping all creatures you control and causing you to get an additional combat phase after this one.
Deal combat damage to an opponent using Aurelia.
Surge to Victory triggers, casting a copy of Ephemerate without paying its mana cost.