Here an old mecanisms that still needs clarification for me :
If you exhaust Elrond and Vilya to reveal an ally on the top of your deck can you :
1/ put him into play
2/ play him
3/ chose to play him or put him into play
Of course assuming that you don't put the card back on the bottom of your deck.
May be it is not significant for you but it is still very different for me.
Edited by Courchevel