1) I know that generally you can't trigger an ability on a card that is out of play, but can I give a trait to a card that is out of play? For instance, could I use Old Nan or Songs of Bael the Bard to give a character in my deck the Dragon trait, then search for it with Dance with Dragons?
2) I can't "play or take control of a unique card" if there is a copy of that card in my dead pile, but as I understand it "put into play" is different than just "play." If I have a copy of a unique card in my dead pile, and one in my discard, an effect that "puts" that card into play from my discard pile is still fair game, right? If so, could i then attach the third copy as a duplicate, or would the card in the dead pile prevent me from playing the duplicate?