"I'd... have to find a suitable container - it could be a corpse or some kind of effigy. It wouldn't be your body unless we could find it, and depending how long you've been dead it might be difficult. But I could... put your soul in there, and then we could get you out. ... Maybe."

He's not a hundred percent sure. It's not like he's ever done it... but he knows the theory and he knows that he can do something like that... "I mean... I can touch you. What's stopping us from just pulling you through the portal?"

Bob just pecks Casper's neck lightly, though he ignores it.