Ideas for new jokers

[MNS]

A few ideas that came to my mind while playing
Inventor:
Has a 1 in 5 chance to create a random common joker after exiting the shop without buying any jokers
Swapper:
Swaps your chips with your multi
Blind joker:
You won't be able to see ranks and colours of cards in your hand, but cards will give 4 times more chips when played

[Unlimited]

i like the first one! (useful in tight/money run from beginning).

[Goblin]

At first I thought Swapper is useless, since AxB = BxA, but since you have control over the order jokers are triggered it could have some niche uses. Not sure it'd ever be great (with the current set of jokers) but it could be cool.
Blind joker sounds more like something to put on a spectral pack card. Turn a number of your deck cards into permanent blind ones but they give bonuses. As a joker, all cards at all times sounds too hard, and just doing the boss blind thing where it's random 1/7 might be too random for a whole playthrough.

[MNS]

I agree with you, Blind joker sounds better as a spectral card than a joker