I put Noah in territory. I play Faith of Jacob and take two of my opponent's heroes to my territory. I attack with Noah. Can I use my opponent's hero to exchange for a hero in my deck, assuming a brigade matches?
Noah - "You may exchange a card in hand or territory with a human of matching brigade (or 2 flood survivors) in deck or discard pile. May band to a flood survivor. Cannot be interrupted."
Faith of Jacob - "Take 2 heroes in an opponent's territory to your territory until end of turn. If used by a Cloud hero during battle, you may add them to battle."