You start with no cards in deck and have to build your way to victory with marble joker (challenge shown in the images)
I have managed to beat this, the x4 base blind size certainly makes it tricky, but it is possible.
How luck-based is this though? (psychic and pillar are banned since you have so few cards)
It also introduces perishable and rental jokers into challenges, which has never been done before. The perishable erosion gives you some time to set up a build, and the rental marble leads to decisions about when is best to sell it.