A lot.MacMathan said:The MM3.5 indicates that a number of creatures can be sucked up into an Air Elementals Whirlwind as it volume allows. It says cone can be from 10-50 feet tall and be 30 feet wide at the top. How many, lets say medium size, creatures would you allow to be contained?
jgsugden said:Yeesh. Elemental swarm (air) suddenly became my favorite mass war spell. 8 or so elementals destroying an entire region in a matter of hours ...

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.