There is air in the PC's lungs, so it can suck that away! But, like I say, I don't mind much either way. I do wonder if it's worth defining "air" vs "abundant air." Maybe we should just limit it to 10 rounds/day period.
Hmmmm. We could have varying durations, I guess. I'm not sure if that's getting too fiddly or not. Do you have a proposal for the durations?
I could go for the second (size-based) progression. Is the storm done after that?
Elemental | Storm Strength Wind Force (Fort DC) | Storm Damage (Fort DC) | Void Storm Diameter | Maximum Duration |
Small | strong? () | 1d4 () | 10–20 ft. | 2 rounds |
Medium | severe? () | 1d6 () | 10–30 ft. | 5 rounds |
Large | windstorm? () | 2d6 () | 10–40 ft. | 10 rounds |
Huge | hurricane? () | 2d8 () | 10–50 ft. | 15 rounds |
Greater | hurricane? () | 2d8 () | 10–60 ft. | 15 rounds |
Elder | hurricane? () | 2d8 () | 10–60 ft. | 15 rounds |
Monolith | tornado? () | 4d6 () | 10–80 ft. | 20 rounds |
I'm not quite sure about the bonus to AC, since that's always seemed quite weird to me (did the designer's really mean that?), but the rest looks good. Can we think of some kind of justification for the AC boost?
I guess we should include it if we think the original monster was intended to be that way (and they didn't get a minus sign wrong).