+1 Spectral card after one of each rank A-9 is played in order (keeps progress between rounds)
A thematic brother of the 8 Ball, this joker has a harsher condition but a stronger payout, while keeping the concept of “play specific cards for a consumable”
Fun straight synergy, and outside of that I feel the spectral cards would be slow enough as to not be totally game-breaking, but a simple nerf could require the A-9 in a row without any other cards in between