Thank you very much, Metastachydium, for your great comments.

Quote Originally Posted by Metastachydium View Post
Outsider's an odd subtype. Native too, on an Ooze.
They are "at least partially composed of the essence (but not necessarily the material) of" the positive energy which is roughly as the same thing as being more or less comprised of the positive energy plane. They are also native to the prime material plane, since they are "born" there.
Sources:
https://www.d20srd.org/srd/typesSubt...m#outsiderType
https://www.d20srd.org/srd/typesSubt...#nativeSubtype
The whole idea behind this that they are supposed to be in the positive energy plane, but they aren't, which is a very lethal problem to sentient creatures near their habitat.

Where's the deflection bonus coming from? The value itself appears kinda random as well.
The deflection bonus is sort of like the "tough hide" of this creature. It represent the protection that the positive energy grants to the ooze. +4 is simply a number that is fairly high, but not very high, and this has to do with the CR.
According to the rules, the simmering positive energy is like a "magic effect that makes attacks veer off harmlessly." https://www.d20srd.org/srd/theBasics...eflectionBonus
In short, it is simply its positive energy that can deflect attacks.

+8 to hit (size). Also, incorporeal? The thing isn't Incorporeal, so far as I can tell.
Thank you. I was sloppy.

Eh, it's a fun one, and has some rad stuff, but unless the party is mostly Undead, I'd see a case for decreasing that value.
The save DCs that are 23 are quite high, and lower level parties would lose their potions almost automatically, and the meat shields need some hp to withstand the explosion. I assume that 9th-level characters can make the save almost half of the time and that 9th-level meat shields can take the explosion without dropping to -10 hp.


Good thinking there. (Does this mean it's immune to Explosive Fast Healing?)
Yes, but it is not mentioned. It is implied (also see the outside type).


Crack theory: there's soul chunks trapped in the thing. Not quite dead enough to pass on or become Deathless, these sad remains desperately try to reconstitute themselves using positive energy, but only do more harm in the process and never achieve true corporeal coherence.
Ohhh, I like it!

What's the +10 based off of? HD?
Yes.

DC 23.



Also DC 23.
Thank you. I was sloppy again, thrice in total.

This doesn't count against the whole "recommended number of creatures to kill for their life energy per day", then?
Correct. It is a voracious creature.