And sorry to be the one who breaks these news to you, there is no Necromancy on Atys. No, ressurecting the dead to do your bidding, unless you confince other players you rezzed to do so

And no conjuring ghosts, or demons either.
SoR works completely different from Games like WhooohOohhWhoooh

(Sorry, coudn´t resist the pun

)
You´d have to realy Roleplay the "evil Warlock" part of that Role.
But anyway, I hope you´ll find your niche on some of Atys branches.
Stay and make yourself fammiliar with the world. You´ll see its much mor satisfiing to be free to do what you want to do, then to be stuck with Class-Restrictions.
CU
Acridiel