This was actually before the 3rd edition take on tieflings with the horns, although we agree it isn't an uncommon motif, except almost no one knew much about Pl

This was actually before the 3rd edition take on tieflings with the horns, although we agree it isn't an uncommon motif, except almost no one knew much about Planescape in 1996 - the events were really sparse because it was considered a really "weird" setting by the core attendees of Gencon. It was literally the three of us, one or two other people, and most of the Planescape devs. Which was fun hanging out with them, including Tony D, Monte Cook, Colin and several others. The next year, in 1997, the three of us went again, and there was a trivia contest for Planescape lore. They had to stop letting us answer questions because we were ringers :)