Cast Surge to Victory by paying 4, exiling Displace from your graveyard and giving creatures you control +3/+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 Displace without paying its mana cost.
Resolve Displace, blinking Aurelia and up to one other creature you control.
Repeat from step 2 each combat phase.
This dazzling loop turns a single strike from Aurelia, the Warleader into an endless chain of assaults by taking advantage of how combat triggers and blinking interact. First, you cast Surge to Victory, exiling Displace from your graveyard to grant your team a massive power boost while setting up a lethal copy-trigger whenever damage connects. When Aurelia charges into battle, her first-attack trigger untaps your creatures and grants an extra combat phase, and the moment she deals damage to an opponent, Surge to Victory triggers to cast a free copy of Displace. Resolving that Displace blinks Aurelia—wiping away her attack restriction so she can surge forward once more—ready to repeat the cycle infinitely across as many combat phases as you desire.