There was this one guy's Deviantart that I got it from. This is the most updated version of the class. It now grants bonus metashadow feats. I'm not sure how I rank its power, because it uses mysteries which are weaker than spells, as well as some maneuvers. This is probably more of a stealth caster akin to a beguiler, because it has useful stuff like teleportation, hiding skills, and a few control spells. I'd rank it power-wise about that of a beguiler.
I'm planning on rolling one up for the Dimension Force game. That game's got fuck-all crazy houserules, but it's balanced to the tier that I think that this character is in.
