This will be great. I like cards that let me draw extra so this is perfect for me.
Yeah, I really like it too; I think this card will be extremely fun. It's obviously best for entropy or rainbow. I do think it should cost a bit more, though; I think I suggested 5 or 6 in another thread.
And yeah, I want to know whether it gives upped or unupped cards, or whether that depends on the status of this shard itself. I'd imagine it would give nymphs (since things like fate egg or mutation do) but I don't know about marks. There wouldn't be a lot of point to that, given you can already possibly draw towers/pends from it.
Also, I see that the shard says 'draw UP to three cards'... does that mean less than 3 cards are possible? If so, the casting cost of 3 is fine.