If I see 3 Nocturnes from Stacked Deck, can I pay for all 3 even though I will be drawing one off Stacked Deck before the trigger resolves?

Ruling: You can banish all three Nocturnes when revealed by Stacked Deck. Stacked Deck won't do anything since the banished Nocturnes are no longer valid cards to add to your hand or recycle.

Sequence:

• When you reveal 3 Nocturnes from Stacked Deck, you can choose to banish all three
• A new chain starts with all 3 Nocturnes (which can't be reacted to because units can't be reacted to)
• Before each Nocturne goes on the chain, you choose between finalizing the unit (by paying its cost) or leaving it in banish
• If you choose not to finalize, the Nocturne stays in banish and the unit is not finalized on the chain

Nuances:

• Nocturne's trigger works with any effect that instructs you to publicly reveal cards from the top of the deck or allows you to secretly see them (like Stacked Deck, Candlelight Sanctum, or the purple Poro with Vision)
• The "and don't draw them" text prevents you from drawing regularly and cheating Nocturne into play that way
• You are not required to play Nocturne if you banish it; the wording is "you may banish, then play"