Initial colors I've picked for Zmey.

I'm not 100% happy, but I'm really trying to avoid using blacks as much as possible... though I think I should switch to silver for his metal of choice, since silver has more lunar associations.
Like most villainous types he likes the finer things in life. He can be especially picky about his clothing and will never wear something that is out of style.

Derives power from stealing people's shadows.
The way I have it worked out so far is:
Once the shadow is gone the person actually becomes quite blissful in the beginning, their shadow contains all the thoughts of negative possibilities and any fears or doubts that person might have. However, without these fears and doubts people begin to behave erratically, throwing caution to the wind and doing any insane thing that comes to mind.