Kaldir, a moon of the gas giant Midr IV, ranks among the coldest terrestrial locations in the Koprulu sector. Its upper atmosphere repels heat and blocks out most sunlight that might reach the surface. As a result, only two indigenous life-forms of significance have been discovered on Kaldir to date. One, a species of extremophilic bacteria, serves as an energy source for the other: a grouping of vicious ursadons.
Kaldir’s gaseous upper atmosphere also produces a planet-wide effect that’s made it a colonization nightmare: flash-freezes that occur with barely a moment’s warning, and coincide with immense temperature drops which can kill just as quickly. These natural factors, so antithetical to off-planet life, belie a surprisingly attractive location for exploration.
After Kerrigan's defeat at Char, the broodmother Nafash took her brood to the world hoping the cold, harsh climate would enhance her brood's resilience. Her ploy failed, and the protoss forces there killed her. Later, Kerrigan, now back in control of the Swarm, arrived on Kaldir seeking her brood only to find Nafash's body and many feral zerg. She attacked the native ursadons, hoping to gain their resistance to cold, and prevented the protoss from contacting Shakuras with their psi-link spires. She then ordered them all killed before they could flee to Shakuras.
- ↑ Blizzard Entertainment. 2010-07-24. Koprulu Sector Systems: Kaldir. Blizzard Entertainment. Accessed 2013-05-28.
- ↑ 2.0 2.1 Blizzard Entertainment. StarCraft II: Heart of the Swarm. (Activision Blizzard). PC. Mission: Heart of the Swarm, Harvest of Screams (in English). 2013-03-12.
- ↑ Blizzard Entertainment. StarCraft II: Heart of the Swarm. (Activision Blizzard). PC. Mission: Heart of the Swarm, Shoot the Messenger (in English). 2013-03-12.