Hypersmurf said:Except that you can change a subject into an undead, if he's already undead... if you get around the immunity.
That is stretching so far that it is inconceivable that the designers ever put that much thought into it. Name three places in the game where immunities can be overcome. We are not talking SR where penetration or something can bypass it, we are talking an immunity.
Do you really think the designers thought it out to this level? If so, they should have clarified what they meant so that people like you and me would not debate over it.
Hypersmurf said:There are at least three ways of doing that mentioned so far:
1. Convince him to drop his immunity. I'm unconvinced by the "not the same as elven Sleep immunity" argument.
How can a creature drop an immunity? This doesn't make sense. Check out the MM. It doesn't state that undead automatically makes the fort save, it states that undead are immune.
They only way to get past an immunity is if you have a game element (spell, magic item) or rule that states directly or indirectly that it gets past the immunity. Granted, PO does not explicitly call out word for word that it overcomes the immunity (otherwise, we would not be having this debate), but it has a sentence in it that indirectly states that.
General rule: "The sky is never red."
Spell: "This turns the sky red."
Just because the spell does not explicitly call out that it overrides the general rule does not mean that it does not do so.
Hypersmurf said:2. Poly Other as a Su ability.
3. Poly Other as an Irresistible Spell.
Where in the rules does it state that you can do something with a spell, but if you cast it from a different source, the spell interpretation is different?
Fly as a spell. Fly as a Su ability. Works the same way. Both can be dispelled, etc. There might be some minor differences between the two with regard to external forces (i.e. you can cast Fly as a spell if Polymorphed, you cannot cast Fly as an Su ability if Polymorphed), but if you actually manage to cast the spell, it works the same way.