Khalis

Khalis is the a powerful psionic crystal. It is light blue in color and possesses the energy of the Dark Templar.

During his journeys on Char, Zeratul detected the powerful crystal, but he was unable to retrieve it.

During StarCraft Episode IV, Shakuras, homeworld of the Dark Templar, was overrun with Zerg. In order to cleanse this infestation, the Xel'Naga Temple on the planet needed to be activated, but it required two crystals, the Uraj and the Khalis, to do so. Raszagal ordered her Protoss warriors to let nothing stand in their way in order to acquire the crystals.

Zeratul, Artanis and Infested Kerrigan, along with the Protoss fleet, arrived on Char in order to retrieve the crystal. Unfortunately, its powerful psionic emanations attracted the Zerg. The new Zerg Overmind was situated very close to it, along with a huge swarm of minions.

Infested Kerrigan suggested snatching the crystal, but Artanis believed his forces could weaken the second Overmind enough to pacify the Zerg for a short period of time so they could retrieve the crystal. Zeratul praised Artanis' bold idea. Kerrigan said either plan would work, and provided assistance by taking command of a Zerg Hive Cluster, which worked alongside the Protosss. After a fierce battle, the crystal was retrieved and taken to Shakuras.

On Shakuras, Zeratul, a Dark Templar, carried the Khalis to the Xel'Naga Temple in order to activate it. He was successful, scouring the Zerg from the planet.