What about Dazzling Aurora? If I reveal Nocturne, do I get to play him and keep going?

No, Dazzling Aurora stops when it finds Nocturne. Nocturne is revealed, then you may choose to banish him or not. If you banish him, you can play him for [A] using his own ability. If you don’t, you can play him for free using Dazzling Aurora’s ability (probably better, but you do you). Either way, you revealed a unit, so you don’t keep going.