Beast of the Week: Chaob

On this day that the Mayans did not predict would be the end of the world, but many people falsely believe that they did (and I'm still here typing this at 20 minutes to midnight local time), how about a Beast inspired by Mayan mythology?  There's not much out there, but a quick Google search netted me the idea.  The Chaob, the four gods of the winds, were said to be able to one day destroy the world.  Sounds appropriate.  Now to turn them into a monster for D&D!

Chaob*
AC: 0 (20)
HD: 5**
Move: 120 (40) fly 480 (160)
Attacks: 2 blows
Damage: 1d10/1d10
No. Appearing: 1d4 (1d4)
Save As: F5
Morale: 9 or more
Treasure Type: B
Alignment: Chaotic
XP: 425

Chaob are transparent, blue humanoid figures from the Elemental Plane of Air.  They are slightly larger than humans, averaging 7' tall.  They can fly naturally at great speed.  In combat, they attack with buffets of wind from their fists.  Each can also use the following magical powers:  Slow 3/day, Ice Storm/Wall 3/day, Hold Monster 1/day, Earthquake 1/week.  When encountered in groups, Chaob tend to be more aggressive.  Reduce reaction rolls by 1 and increase morale by 1 for each chaob in a group beyond the first.  If they do not attack immediately, chaobs can be bargained with to perform services for parties, but only if they can be paid in magic items or art objects of at least 1,000 gp value for each hour of service rendered.