Actually, it's easy.
There is another domain in Forgotten Realms specifically to address that problem.
It's called "Repose." It's for Death themed entities that are opposed to the undead. You'll find it in the Player's Guide to Faerun (a 3.5 book).
For a granted power you get Death Touch. A supernatural melee touch attack usable 1/day. It does 1d6/ cleric level, and if it does as many HP as the target has left, the target dies with no save. Basically a fancy way of saying it doesn't deal with negative hit points or any of that. If it puts you to zero or less, bam. Dead. It IS a death effect.
You get
Hide from Undead
Gentle Repose
Speak w/Dead
Death Ward
Slay Living
Undeath to Death
Destruction
Surelife (a spell from the Player's Guide to Faerun that basically makes you immune to death from one specific source for a period of time)
Wail of the Banshee.