Back in the days of D&D 2nd ed and Spelljammer, the use of Obscuring mist could be used to partially refresh an air supply that had been fouled through use since it conjures air and water vapor. Does pathfinder allow for this kind of use? Thoughts?
I ask because a scenario I just played (which shall remain nameless to avoid spoilers) had a dungeon with a fouled air supply and we were forced to hold our breath to traverse some sections that were worse than others. If the obscuring mist trick works, it'd be a fun use of an otherwise hum-drum spell.
Why would I think that? Well it's the domain spell for both the Water AND Air domains and it's a Conjuration spell.
In the old editions it used to pull the mist from the plane of air. I see now, though, that the [creation] descriptor on the current Pathfinder version would change that.
In Pathfinder it does not refresh air.
In the real world air you breath in contains about 20% oxygen and you breathe out about 15% oxygen, so in a area with low-oxygen every breath you breathe out would help replenish the air quality.
Why would the exhaled oxygen leave the magical Air Bubble surrounding your head?
Normal air is exhaled through the same organs that inhale it, which of course must be inside the Air Bubble in order to benefit from it. So any air breathed out would also be inside the Air Bubble. If air could escape the bubble, then the spell would dissipate as soon as it was cast, and would be kind of silly :-)
Breathing air removes 5% oxygen (by the above poster's math, unverified), and never adds oxygen; there's no way around that -- unless your character is a plant -- but of course the Air Bubble spell presumably replenishes the loss magically.
That said, I see no reason why a character under the influence of an Air Bubble spell couldn't breath directly into another character's mouth to keep them alive. Just a bit more intimate ;-)
Edited to better address the actual points made above.
To the OP: "mist" is technically "a cloud of tiny water droplets suspended in the atmosphere". While there's nothing in the Pathfinder rules that specifies an Obscuring Mist spell as having the replenishing properties it (or similar spells) featured in previous editions, I would think there's nothing preventing a GM from ruling that the conjuration includes both the "water droplets" and the "atmosphere" as components of the "mist".
To the OP: "mist" is technically "a cloud of tiny water droplets suspended in the atmosphere". While there's nothing in the Pathfinder rules that specifies an Obscuring Mist spell as having the replenishing properties it (or similar spells) featured in previous editions, I would think there's nothing preventing a GM from ruling that the conjuration includes both the "water droplets" and the "atmosphere" as components of the "mist".They could rule that. Nothing to say they should or would, though.
Right, other than the definition of "mist" I just mentioned, and which you quoted. "Mist" includes atmosphere. Of course, the GM might also rule that the "atmosphere" created is composed of gasses other than air, in which case I assume that an Obscuring Mist spell would also serve to foul the surrounding air.
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That was a specific alteration to the standard rules for spelljammer, and as many people argue that 3.5 rules are irrelevant to PF your chances of successfully using 2e rule as some form of official basis is going to be ... tough. RAW obscuring mist does nothing save provide concealment.
In my game I might be persuaded though, might require a successful dip check (or chocolate [+10 to dip checks]).