I would love to offer some critique, but right now it's 3am and I'm having trouble wrapping my head around all the combos XD
So far, nothing stands out as incredibly OP - the only thing I'd suggest looking at would be the percentage-based cards. I think that 50% chance is something most people are OK with, but the 75% and 25% seem awkward to me. I don't know how you'd re-balance the cards though, so perhaps it would be better to keep them as they are.
I love the thought you've put into this though - great to see such original ideas :D