As for the cards themselves, I really really like the designs. I know we (well, you and other people, I mostly watched) talked a lot about 'simplicity' and what it brings to a card. I don't have too much to add to that discussion other than to say that I think you struck a really good balance between novelty and simplicity. One aspect of these particular cards that I think you could improve upon would be the flavor of each, as all five have certain similarities--specifically, the art is similar (spooky raven-haired women with shoulder pads doing magic, mostly) and all of them are named Adjective Job.
I'm also not sold on the following mechanics:
Envious Aspirant needing Menace and having an ability that needs her to survive, as these conflict a fair bit.
Chainblade Shinobi having Flash, as that bleeds into Ninjutsu's design space.
However, I think they're great cards for your particular cube, and they're mechanically doing what you want them to, so I'd back you shipping them as game pieces! They're certainly a cut above anything I've produced.