High templar are potent psionic warriors that use their powers to support allied forces.
Somewhat the polar opposites of the Dark Templar, these veteran warriors derive their strength from the Khala. High Templars are best known for unleashing deadly Psionic Storms to obliterate countless numbers of enemy forces.
During times of desperate need, a High Templar and merge with another to form Archons. After the events of the Brood War, both High and Dark Templars have put aside most of their differences in order to combat the threat known as the Queen of Blades.
For more information see High templar on the parent site.