Polymorphing outsiders and undead

[KarinsDad]

It's not 3rd party - it's a WotC book written by Monte Cook. And it has exactly the same kind of mechanic as Phantasmal Killer.

So it is neither bizzare, nor third party. The primary author of the entire friggin game wrote it for the company that produces the game.

Fine.

That doesn't change the fact that it has nothing to do with how Polymorph Other works.

Besides, a first level spell that makes someones eyeballs explode is still bizarre, overpowered and I personally do not care if Gygax himself wrote it.

A spell from left field has no bearing on how the rules work with regard to core spells and you have yet to illustrate that it has anything to do with anything on this topic. In your own words, "it is not relevant". Regardless of how it works, it indicates nothing about how Polymorph Other works.