Which card can Gambit's Stack the Deck put on top of the deck, and does a card put back count as played for other effects like Longshot's?

Question

Accepted Answer

The card must come from your hand, so a card you already played cannot be chosen. A card Gambit puts back on top does not count as played for later effects such as Longshot's Fortune Favors the Bold. Each card resolves on its own, so put a different card on top when Longshot needs one.

Legendary: A Marvel Deck Building Game

Which card can Gambit's Stack the Deck put on top of the deck, and does a card put back count as played for other effects like Longshot's?