
Short Wart Cohort |

Several monsters, such as daemons, are immune to death effects. The section on immunity in the CRB states that:
"If you have immunity to effects with a certain trait (such as death effects, poison, or disease) you are unaffected by any effect with that trait".
How I understand things:
- Any effect with the "Death" trait is a "death effect"
- If you're immune to death effects, and someone casts a spell on you that has the death trait, you are completely unaffected by the spell
The second point above is what confuses me. Let's say a 12th-level spellcaster casts a 6th level Phantasmal Killer spell on a Cacodaemon (Harvester Daemon).
- Phantasmal Killer has the Death trait
- This level 1 monster is immune to death effects
So does the spell have zero effect? Or does the spell play out as normal, only the daemon cannot be killed by the insta-death if it critically fails its Will and Fortitude saves? What if the resulting damage from failing those two saves is enough to kill the daemon in a single blow?
Any help would be appreciated.