Stacked Deck

The process starts as you look at or reveal cards from the top of your Main Deck due to an effect. Let's use Stacked Deck as an example. You play Stacked Deck and look at the top 3 cards of your deck. Nocturne is among them. You now get to choose whether to banish him or not. If you choose to banish him, you immediately begin the process of playing him from banishment, placing him on the chain as a pending item. Then you continue resolving Stacked Deck. There are only 2 cards left of the original 3; you'll choose one to put into your hand and recycle the other one. Then, since Stacked Deck has finished resolving, you'll finish the steps of putting Nocturne onto the chain from banishment, paying [A] (that's one power of any type) instead of his base cost. As usual for units, he'll resolve immediately and enter the board exhausted. If you weren't able to play him for any reason, he'll just stay banished.

Q: If I reveal multiple Nocturnes, can I play more than one? What if all 3 of the cards I look at for Stacked Deck are Nocturnes and I play all of them?

Yes, you can play more than one Nocturne at a time this way. If there aren't any eligible cards left for the original effect you were resolving, any further instructions will be ignored. So if you reveal Stacked Deck, see 3 Nocturnes, and opt to banish and play all of them, you won't put any cards into your hand, nor will you recycle any cards. You will, however, have 3 Nocturnes.

702.5.b.1. For example, if a player plays a Stacked Deck and adds a fourth card to the private set of cards they are looking at, it is Looking at Extra Cards. If they correctly look at the top three, but knock the top card of their Main Deck over without adding it to the private group, it is Looking at Secret Information.