there needs to be negative and tarot starting decks. also make it so negatives have interesting effects on negative blackjack so you can still win.
Viewing post in Dungeons & Degenerate Gamblers comments
negative blackjack could never and will never be a thing. the format don't support it, it wouldn't make sense with how the negative cards say " * effect cannot be reduced below zero". not to mention that there is no negative limit.
you could potentially have a card that multiplies all current played card values by -1. in fact you could probably theme it after the inverter from shotgun roulette.