In my recent game -- #182307794 , turn 17 -- I had a Possession turn, and as chance would have it, my opponent's hand that I got to play had Change in it. I played it onto Farmhands that was also in the hand, and, lo and behold, among the number of cards I was given the option to turn the Farmhands into, there was also the Possession. In other words: I transformed my opponents Farmlands into Possession (which was gained by me). I don't even think there was -- I'm almost sure there wasn't -- a Potion in that hand (not that it should make any difference, IMO).
