| Nearyn |
Yes. Any immunity the creature might possess is noted in its defensive qualities. An example from Fire-elementals:
DEFENSE
AC 19, touch 15, flat-footed 13 (+5 Dex, +1 dodge, +4 natural, –1 size)
hp 60 (8d10+16)
Fort +8, Ref +11, Will +4
DR 5/—; Immune elemental traits, fire
Weaknesses vulnerability to cold
Here you can see the fire-elemental is immune to fire-damage and whatever is covered by elemental traits. The traits can be found under the creature type.
Hope it helps.
-Nearyn
| Gauss |
Outsiders are alive, they have constitution scores. Creatures which are not alive do not have constitution scores.
Anything alive is affected by positive or negative energy damage in the normal manner (positive heals, negative harms) unless there is wording to the contrary (such as negative energy affinity).
In case this question is due to the Alignment Channel feat, the reason that feat exists is so you can heal or harm outsiders without worrying about healing or harming other creatures.
| Cyrad RPG Superstar Season 9 Top 16 |
Holy/unholy is more like an adjective that attaches to damage types. Negative and positive energy is a phenomena like fire or electricity. It has its own properties that exist in the game world. That's what makes it interesting. Positive energy creates organic life whereas negative energy destroys it and creates a mockery of life. The only connection between positive/negative energy and alignments stems from the alignment restrictions in the cleric's channel positive/negative energy. Even with that, many people argue such features should have been divorced from alignment since there's many examples where an evil entity can be a life giver (like Lamashtu) and a good entities using negative energy to smite evil.
Unfortunately, 4th and 5th Edition just say "screw that" and combined holy/unholy and positive/negative energy into an abstract damage type to turn damage types into Pokemon.