Prot gives undead poison affect for 3 hours like normal, but dead are immune to poison.
Should it perhaps check for undead or poison immunity?

log snippet:

Skill: 'poison' modifies strength by -5 for 3 hours.
Spell: 'wraithform' for 3 hours.
Spell: 'wraithform' modifies pierce resistance by 38 for 3 hours.
Spell: 'wraithform' modifies slash resistance by 38 for 3 hours.
Spell: 'wraithform' modifies bash resistance by 38 for 3 hours.
Spell: 'wraithform' for 3 hours.



A flesh golem shivers and suffers.
A flesh golem is unaffected by its own poison.
A zombie of a war-weary storm giant shivers and suffers.
A zombie of a war-weary storm giant is unaffected by her own poison.
A zombie of a gorgeous silver-haired elf shivers and suffers.
A zombie of a gorgeous silver-haired elf is unaffected by her own poison.
A ghoul shivers and suffers.
A ghoul is unaffected by its own poison.
A zombie of a gorgeous silver-haired elf shivers and suffers.
A zombie of a gorgeous silver-haired elf is unaffected by her own poison.
A zombie of a unicorn shivers and suffers.
A zombie of a unicorn is unaffected by her own poison.
A zombie of the old dwarf shivers and suffers.
A zombie of the old dwarf is unaffected by her own poison.
You shiver and suffer.
Luckily, you are immune to that.