Well you have a few things that the artist will be asking you.
Like are you looking for it be a realistic tattoo where it is believable that the sorceress is a real being.
Or do you want it to remain in the art-style of it being a video game character?
Color or Black and Gray? Personally I love the black and gray tattoo palettes but I am looking at getting a new color piece done after I finish my current piece. (Lol)
Something I have seen before on a tattoo, although it was a sorcerer? rather a sorceress, (I'm so used to wizard/witch xd) - but it was rather similar concept.
The guy had it so each hand was displaying a different element he chose to have Fire/Cold displayed on the hands, while along with that he had a "shock" effect happening over the whole body.
All in all it turned out pretty well, although it was included on his elemental sleeve, looked pretty sick.
I'm really bad at finding sources to represent what I am talking about but kinda of what I mean with the shock effect, just has lightning running all around:
http://media.steampowered.com/steamcommunity/public/images/items/256410/f54f36e8926bf2cda08e8d031635741c773eb2ec.jpgprobably know what I mean, if not :S
but GL on it, make sure to either post up or pm the sketch/final result whether you do or do not get it.