Sinkha: Planet of the Clouds

Chaa-Dedres is a gas giant. Its unending atmosphere is violently shaken by immense hurricanes, above which rise the fabulous aerial cities of the Pneumopods, beings that are able to control the elements. But in its lower layers, under the hydrocarbon storms where the atmosphere is denser, a dangerous secret hides. A secret concerning a terrible Khahaek weapon which could even threaten the immense power of the Sinkha.

[From Wikipedia]