Resist Death
Necromancy
Level: Clr 1, Drd 2, Pal 1
Components: V, S, DF
Casting Time: 1 standard action
Range: Touch
Target: Living creature touched
Duration: 1 min./level
Saving Throw: Will negates (harmless)
Spell Resistance: Yes (harmless)
The creature gains a +3 resistance bonus against [Death] effects, with an additional +1 to the bonus for every four caster levels you have (maximum +8 resistance bonus at 20th level).
Should this be limited to Fortitude saves? It probably only matters for Phantasmal Killer/Weird but I might be missing something.
Posted because dmanus said "I think it's a chill idea for a spell.", so thanks to them for that!
EDIT:
Resist Death, Mass (Nota Bene: This spell provides a SMALLER bonus that its predecessor, because I wanted to squeeze it in at 3rd level for campaign-specific reasons.)
Necromancy
Level: Clr 3, Drd 4, Pal 3
Components: V, S, DF
Casting Time: 1 standard action
Range: Close (25 ft. + 5 ft./2 levels)
Target: One creature/level, no two of which can be more than 30 ft. apart
Duration: 1 min./level
Saving Throw: Will negates (harmless)
Spell Resistance: Yes (harmless)
The creature gains a resistance bonus against [Death] effects equal to 2+MINIMUM(4, FLOOR(Caster Level/5) ).