If you use Stacked Deck and see a Nocturne, don't choose to put it in your hand. Can you play it for one recycled rune?

Yes, you can play Nocturne in this scenario.

According to the FAQs for this interaction (FAQ 8948, 8822), when you reveal Nocturne while looking at the top cards of your deck with Stacked Deck, his ability triggers, allowing you to banish him and play him for [A] (any rune).

Here is the breakdown of how this works:

1. Stacked Deck Resolution: As Stacked Deck resolves, you look at the top 3 cards of your Main Deck.
2. Nocturne's Ability: Because you are "looking at" Nocturne, his ability triggers. You may choose to banish him.
3. Playing Nocturne: If you banish him, you may play him for [A]. He is placed on the chain pending.
4. Completing Stacked Deck: Stacked Deck finishes resolving. You choose one of the remaining cards to put into your hand and recycle the rest. Playing Nocturne does not count as the card you put into your hand from Stacked Deck.
5. Finalizing: After Stacked Deck finishes, you pay the cost ([A]) to finalize Nocturne.

Important Nuances:

• Cost Payment: You cannot exhaust runes to float energy during the resolution of Stacked Deck. You exhaust runes to pay for Nocturne after Stacked Deck finishes resolving and you are prompted to pay the cost to finalize the unit (FAQ 1157).
• Not a Hand Card: Per FAQ 6744, playing Nocturne this way does not count as the one card you are allowed to put into your hand from Stacked Deck.
• Nocturne's Cost: Note that Nocturne's ability allows you to play him for [A] (any rune), not specifically a "recycled rune." You pay this cost by exhausting a rune from your Rune Pool when he finalizes.