Psionic storm

A Psionic Storm is storm of raw psychic energy produced by a protoss. It is a powerful technique wielded by high templar and the Queen of Blades.

Overview
Protoss who follow the Khala can produce such as storm by closing their mind to the outside world, sending out psychic "ripples" that are disruptive to other lifeforms Such storms can also damage vehicles and the landscape itself. Such is the power of a psionic storm that it can send shockwaves through the air around it.

The storm is a physical display of the psionic power of a high templar. It concentrates all the psionic energy over a given area, so overlapping storms have no greater effect than a single one.

While Dark Templar can create psionic storms, only through the discipline of the Khala can it be controlled. Khalai who have not mastered the use of the ability can try to control Psionic Storms unleashed by Dark Templar (and similarly-powered protoss, such as the Tal'darim) but it frequently results in the death of both participants as they burn out like a star. Individual protoss who have used both types of abilities (such as Adun) have faced a similar fate.

History
During the Discord, Dark Templar lost control of their powers, creating storms on Aiur which killed many protoss and destroyed parts of the landscape itself. Storms appeared on other protoss colonies, such as Khyrador.