Tzeentchian Sorceror/Eldar Warlock

Dappy's all time favorite antag role, guess why.

Yer a wizard 'Arry
The Wizard role has been altered quite a bit, to fit 40k. IT is now split into two seperate possibilities.

Tzeentchian Sorceror
Tzeentch DEMANDS that you decieve, toss warpfire, and plot to sabotage the Outpost! Generally, a Sorceror is a master of Warp Sorcery, usually seen with a Staff of Change (Bedlam Staff) and blue, armored robes.

Eldar Warlock
The Remnants of the Ilotic Craftworld look to you for guidance in the absence of a farseer. As a Warlock, you have powerful psychic ability and the added bonus of working alongside the resident Eldar Spies aboard. It's best not to run about killing everyone, as that never gets you in good favor with the Autarch.

If You Ever See a Sorceror Named "Astrakhr the Warp-Eye"...
Run.