Dirty Schultz

Seven card Stud Poker. If throughout the course of cards being dealt face-up, a player pairs up (receives a card of the same rank as a card already in his or her hand face-up), then the next card dealt face-up (and all matching cards) is wild.

If, later in the same hand, a player pairs up again, then the next card dealt up is wild, with the old wild card no longer wild, a la Follow The Queen.