Here is the situation.
The party sneaks in on an sleeping dragon, using stealth and silence. On on the characters who is large delivers a coup de grace on the dragon.
DM says that it doesn't kill it because the dragon is immune to death effects.
Question: Is a coup de grace a death effect as stated in the immunity?
2 sides:
#1 Yes, the dragon lives.
#2 No, it dies.
The rule book states...
Death Attacks
In most cases, a death attack allows the victim a Fortitude save to avoid the affect, but if the save fails, the character dies instantly.
* Raise dead doesn’t work on someone killed by a death attack.
* Death attacks slay instantly. A victim cannot be made stable and thereby kept alive.
* In case it matters, a dead character, no matter how she died, has -10 hit points.
* The spell death ward protects a character against these attacks.
I'm pretty certain that you could raise someone who died from a coup de grace... And on the other hand a spell like Death Ward wouldn't protect you against one...
Does anyone have a reference that would clear the situation? Otherwise, it's almost a TPK (total party killer).
Thanks for any input.