No one may be Prophet twice in same round. Card just played is marked with black chess king. Prophet keeps hand, but makes no more plays unless declared False Prophet. Black king is removed, False Prophet is dealt 5 penalty cards, and goes back to being a regular player. Prophet is overthrown.
Prophet is overthrown.
If Prophet chooses wrong, card Prophet chose is put back in hand, and player keeps old hand. No penalty cards. Prophet is overthrown. After 30 cards are played, and there is no Prophet, every time player plays wrong, he is expelled. After 20 cards have been played since the black king, wrong plays cause expulsion.