"Ghoul" "Magic"

[Greg 1]

As you may know if you've seen my other thread, I'm working on a setting in which PCs are different sorts of vampires. One of these is the "Ghoul".

I'm also basing most, but not all, vampire abilities on the standard GURPS Magic system, using stored blood as Fatigue.

I want Ghoul special abilities to be focused on the use of dead animal matter (including human matter). But I'm not sure what I want the abilities to be.

One possibility I'm entertaining is to say that the Ghoul PC can can any spell in Magic, but the spell will only work if cast on dead animal matter. That might be a boring option, though.

Thoughts? How do I make it choul to play a ghoul?