Steel_Wind said:
The problem with commune is that:
1) It assumes the deity being communed with will tell the truth;
2) It assumes that there actually IS such a thing as commune in the first place. We believe thre spell exists nad workd through metagaming whereas a person in the game world does not;
3) It assumes the cleric will not lie about A) casting the spell and B) what the response was.
4) that a cleric will actually do this for what amounts to bothering his/her god for a trivial matter.
Commune
Divination
Level: Clr 5
Components: V, S, M, DF, XP
Casting Time: 10 minutes
Range: Personal
Target: You
Duration: 1 round/level
You contact your deity—or agents thereof —and ask questions that can be answered by a simple yes or no. (A cleric of no particular deity contacts a philosophically allied deity.) You are allowed one such question per caster level.
The answers given are correct within the limits of the entity’s knowledge. “Unclear” is a legitimate answer, because powerful beings of the Outer Planes are not necessarily omniscient. In cases where a one-word answer would be misleading or contrary to the deity’s interests, a short phrase (five words or less) may be given as an answer instead.
The spell, at best, provides information to aid character decisions. The entities contacted structure their answers to further their own purposes. If you lag, discuss the answers, or go off to do anything else, the spell ends.
Material Component
Holy (or unholy) water and incense.
XP Cost
100 XP.
1) According to the spell the deity does not have a choice. "The answers given are correct within the limits of the entity’s knowledge"
2) Being D&D it is generally assumed that PH spells exist. Whether or not an individual in a D&D world might believe the PH spells are faked or might not know about them won't stop a standard PC from trying to use this common D&D resource.
3) True, the priest could lie. But detecting lies is something that a PC can also work to do through various means (and sense motive is a rogue class skill). Plus he could turn to a PC cleric he trusts.
4) It would depend on the culture, but generally I think establishing paternity would be one of the more common questions priests get asked.
The real question is whether the god knows. How omniscient is the cleric's god? For instance in classical Norse mythology, gods have to use special mechanisms (Odin's throne allows him to see throughout the nine worlds and he has spy ravens who tell him things, etc. but Thor knows only what he sees directly before him).