From what i've read and experienced, it seems you need to grind the fk out of some rep. I got Thundercloud from crypturd at 24/25 rank, which im assuming might be a few ranks lucky. Aside from that I got nothing that nobody else has probably got. The other ranks seem to be around rank 10, which really sounds like a grind (you of course get a random shadder that should match colours they use). This is a total pain and not to mention that the limited 9 slots on a character will be a problem in the future when and if players keep playing this game long enough to obtained 1/2 of them. The vault is actually tiny and i think even with the 27 slots from characters you still couldn't hold every shadder. The vault just barely has much more room then a character... wtf is with that? Game is just so poorly done.