Here’s a little beastie that popped into my head today while I was walking the dog. Strangely enough, there was a cloud-filled sky …

Cloud Whale
Type: Elemental (Air)
Size: Huge
Hit Dice: 36
Armor Class: 16 [+1]
Attack: Bite (6d6 + 1d6 electricity), slam (3d6 + 1d6 electricity)
Move: Fly 100′
Save: 7
Intelligence: Low
Alignment: Neutral (N)
No. Appearing: 1d4
XP/CL: 3,600/37

SA—Resistance to cold and electricity, immune to fire

SP—Gaseous form, gust of wind •••

Cloud whales look just as you might expect, as masses of clouds in the shape of whales. They swim through the sky, only rarely descending near the ground, feeding on incendiary vapors and smoke. These vapors are spouted from the cloud whale every so often as a gout of flame, and coagulate within them as “flambergris”, a waxy, reddish mass about the size of a human fist, that can be used by magic-users in fire-oriented magic. A ball of flambergris is worth 500 gp. A ball can be set ablaze and thrown in the manner of alchemist’s fire.