Another problem with Big Man Down is that it does something that often might have zero impact on the game
Dozens of valuable individual cards are also extremely popular with Pokmon collectors
However, getting more opportunities to play Tragic Hero sooner can help you with card advantage in the early game, as your opponent might not have much to answer Tragic Hero before turn 4-5 without losing board tempo
And of course, only big collector's will want the Black Belt promos (as it's player bulk, and I can't imagine the average collector will care), and a larger market will want the Professor's but I speculate no more than a few dollars a piece on those at release, if that
This is great insurance, as losing your board to Westvale Abbey only to lose Ormendahl to removal always feels rough
In a format where powerful creatures are commonplace, being able to exile a creature is a significant advantage