Geez. Deep breaths, people!
I did not intend to suggest that the Conjuration (Creation) tag should be read to imply that the spell creates normal acid. I was just saying that a reader could easily think that. (And quit being mean, kreynolds!
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The best way to be certain is to look at the Spell Resistance line of the spell description. Melf's Acid Arrow says 'Spell Resistance: Yes'. Spell resistance does not affect non-magical secondary effects; hence, the acid in Melf's Acid Arrow is magical. OK?
Crothian-the contents of a vial of acid burn for only one round. So the limited duration is not evidence of a magical nature. (Maybe it's evidence that D&D is unrealistic, if you needed any more.
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Certainly, there'd be no question if the spell was Evocation, but the Conjuration (Creation) descriptor does not prove one way or the other how the spell works. For whatever reason, some Conjuration (Creation) spells create real effects that are not subject to SR (eg. the Summon Monster spells), and others do not. Go figure. (I suspect it has less to do with game logic and more to do with game balance-"We need to make sure that specialist wizards who take Evocation as their prohibited school still have some useful offensive spells." "How about we stick some into the Conjuration school?" "Sounds good to me.")
I did not intend to suggest that the Conjuration (Creation) tag should be read to imply that the spell creates normal acid. I was just saying that a reader could easily think that. (And quit being mean, kreynolds!

The best way to be certain is to look at the Spell Resistance line of the spell description. Melf's Acid Arrow says 'Spell Resistance: Yes'. Spell resistance does not affect non-magical secondary effects; hence, the acid in Melf's Acid Arrow is magical. OK?
Crothian-the contents of a vial of acid burn for only one round. So the limited duration is not evidence of a magical nature. (Maybe it's evidence that D&D is unrealistic, if you needed any more.

Certainly, there'd be no question if the spell was Evocation, but the Conjuration (Creation) descriptor does not prove one way or the other how the spell works. For whatever reason, some Conjuration (Creation) spells create real effects that are not subject to SR (eg. the Summon Monster spells), and others do not. Go figure. (I suspect it has less to do with game logic and more to do with game balance-"We need to make sure that specialist wizards who take Evocation as their prohibited school still have some useful offensive spells." "How about we stick some into the Conjuration school?" "Sounds good to me.")