In the spell Death Ward's description you can find the following:
"The subject is immune to energy drain and any negative energy
effects, including channeled negative energy."
But what are negative energy effects and what are not?.
Should it be considered that, since Necromancy deals with "the power of death, unlife and the life force" it sometimes deals with negative energy, to decide if death ward protects against spells like "waves of fatigue" or "ray of enfeeblement"? Or should those spells be taken as manipulations of the life force rather than negative energy effects? I guess this is the correct interpretation, but....
A Shadow or a Wraith's touch attack are somehow obvious negative energy effects, given the nature of those undead creatures, aren't they? Does death ward provide immunity against them? If not, why aren't those attacs to be considered negative energy effects?. Are Shadows and Wraiths expert life force manipulators as well?.
I just think that Death Ward lacks a bit of concretion here.
Thoughts?
Thanks :P