I havn't actually bought 3rd edition yet, but I've been DMing a little for about a year (Werewolf: The Apocalypse, Paranoia: High Programmers) and from what I've heard I was thinking about buying using it to run 'The Enemy Within'.
In Death on the Reik there's an oppertunity for PCs to pick up necromancy. How would you deal with that? Eliminate the oppertunity, make up some cards for it, ... Are there currently published necromancy rules?