When Dazzling Aurora reveals Nocturne as the first unit, does Nocturne's alternative cost effect trigger immediately and allow Aurora to continue searching, or does Aurora's effect end after revealing Nocturne?

Ruling: Dazzling Aurora stops when it first reveals a unit. If Nocturne is the first unit revealed, Aurora's effect ends there and plays Nocturne normally. Nocturne's alternative cost effect does not trigger from being revealed.

Sequence:

• Dazzling Aurora begins revealing cards from deck
• When Nocturne (a unit) is revealed, Aurora's effect stops
• Aurora plays the revealed Nocturne
• Aurora's effect is complete

Nuances:

• You are allowed to pay Nocturne's alternative cost instead of having Aurora play it for free, but Aurora's effect still ends after revealing the first unit regardless
• If you pay the alternative cost, Aurora does not continue searching for another unit