This is a mod idea to add a unique and powerful joker for each deck, and are sorta treated like legendary jokers, but aren't because it'd mess with the legendary pool. The way you get these jokers is through a new uncommon joker:
The ritual
Uncommon
at start of blind, destroys the joker to the right. Activates after a negative, polychrome, foil, and holographic joker has been destroyed by a joker this run. When activated, sell to summon a special joker based on your deck (displays what said joker does off to the side of the description)
If you have any better ideas for the ritual please tell me since I need a better condition for making these jokers. I don't have ideas for every deck yet so hearing your ideas would be fun