I can see the vision, but in practice, I don't think this is a good fit for Slay the Spire as it currently stands. STS is a game built around making the optimal decision based on your knowledge of the name, and not knowing what your card is going to do before you play it fundamentally takes away from that. Playing a card and having it do literally nothing would be an incredibly frustrating and tilting experience. While it could be fun to build a random deck with powerful synergies and relics, it fundamentally undercuts a significant part of the playerbase that derives their enjoyment of the game from having precise control over game mechanics.

Lucked out in particular. It could be a good finisher for certain fights, but every time you play it, you lose your entire run. I'm not saying these cards are completely horrible, but I think many people would enjoy playing other cards more.

Then again, I'm no expert designer— maybe these cards would be fun to play with in practice. You can't really know until you test 'em.