Vodniks are a favorite creature of mine, so I was predisposed to like this. The "magical gaze" power is evocative, open-ended, and interesting. I wish there were a tad bit more on the ability to sift through a target's memories, and I'd be curious to know if either charm option is intended to have the traditional failure points of the more standard charm person spell.

Having the beast-form's tail do more damage than a bite seems a bit odd to me, but there are similar infelicities in the standard OSE monster list. The decision to allow the shift to beast form in darkness (rather than immersion, for instance) is interesting, but I like it.

I'd be curious to see how this shakes out in play! It's a very front-loaded class but that may be just what is desired for a campaign.