I'm picking some new spells from UM for my cleric and two that I liked are "Archons Aura" and "Aura of Menace". My friend says I can't have have both up at the same time because "they are two different auras".
Is there any official rule that's keeping me from having both up?
Nope. A cleric of a Lawful Good god (or any of the corner alignments) will have multiple auras; one for good and one for law. There is nothing in the aura rules (that my cursory look could find) that limit you to just one aura.
Since Aura of Menace is not a spell in UM, but rather an archon ability, I assume you are thinking of Aura of Doom or something similar. Neither spell makes them exclusive of each other either.
Ah. I did mean Aura of Doom. Thank you.
Nope. A cleric of a Lawful Good god (or any of the corner alignments) will have multiple auras; one for good and one for law. There is nothing in the aura rules (that my cursory look could find) that limit you to just one aura.
Since Aura of Menace is not a spell in UM, but rather an archon ability, I assume you are thinking of Aura of Doom or something similar. Neither spell makes them exclusive of each other either.
Would that also work for clerical domain powers? Protection and Archon domains, for instance, give the cleric an aura to boost his allies.
Yes. You can have multiple auras, as a general rule. Unless something specific about a spell/ability prevents it, it works.