Challenges: Return 1 character to your hand (cannot be saved) to put another character with the same cost (and a different title) into play from your hand.
Can I take any character that I own and is in play back into my hand? Meaning controlled by others but owned by me. How about a shadows character?
Also, in conjunction with knights of the storm can I change the first player mid challenge phase? if so, what would the outcome be?