Standard Dega combo

[DylanW18]

Well, if you've attacked with the demon, they either sac and tap it and give it a counter or let it attack. Either way, it would still be tapped during the 2nd combat since Aurelia doesn't untap things after the first combat.
So this really only works if you have sone other way of untapping the demon

Aurelia colearlo saya untap all creatifes you control.

It only says for the first combat though.

Because tapping happens after attackers are declared (meaning after Aurelia untaps them), does that not mean that once the attack is checked as legal, all attacking creatures during the first combat will be tapped during the second combat?

Or is Aurelia worded where the the untapping occurs after the tap-from-attacking part?

{Aureliathe Warleader} says "untap each creature you control, then take an additional combat phase". Every creature, no matter how they were tapped, untap