Skip to main content

Kaldir

Frozen Moon of the Swarm's Adaptation

Kaldir was a frozen moon of Midr IV, among the coldest places in the Koprulu sector, where Sarah Kerrigan infested the world to make the Swarm resistant to cold and clashed with a stranded protoss expedition.

By Joe Garratt

Kaldir was a frozen moon of Midr IV, ranking among the coldest terrestrial locations in the Koprulu sector. It became a battleground when Sarah Kerrigan chose to infest it so the zerg Swarm could evolve resistance to extreme cold, bringing her into conflict with a stranded protoss expedition and birthing the broodmother Niadra.

A moon of lethal cold#

Kaldir ranked among the coldest terrestrial locations in the Koprulu sector, with a surface temperature as cold as deep space. Its gaseous upper atmosphere repelled heat, blocked out most of the sunlight that might have reached the surface, and produced flash-freezes that struck with barely a moment's warning, bringing immense temperature drops that could kill just as quickly. Ursadons and a species of extremophilic bacteria that served as the ursadons' energy source were the only two indigenous life-forms of significance discovered on the moon, and resources were hard to find. Kaldir lay so far from Shakuras that Khalai protoss could not use the Khala to reach it, and relied instead on technology to send their messages. At some point in the moon's history the xel'naga had visited and left shrines upon its surface.

The Second Great War#

During the Second Great War in 2504, a protoss expedition came to Kaldir to see whether the moon's rotation could be altered and its climate improved. At the same time, hoping to make the Swarm stronger by evolving a way to deal with extreme cold, Sarah Kerrigan sent Broodmother Nafash to infest the moon.

Nafash established a hive on a plain, then moved off into the ice valleys. The protoss struck, and Nafash fell back to prepared positions, but the protoss hunted her down and killed her. Kerrigan arrived sometime thereafter and collected the essence of an ursadon matriarch to make the zerg resistant to the flash-freezes. After she awakened Nafash's hive cluster, the protoss Expedition Leader attempted to contact Shakuras and summon the Golden Armada, but the zerg used the flash-freeze storms to cover an assault that destroyed the psi-link spires. The Expedition Leader then tried to evacuate through warp conduits, only for Kerrigan to awaken Nafash's hydralisks and destroy the shuttles before they could reach the conduits.

The protoss escaped in the vessel they had used to travel to Kaldir. Kerrigan created the broodmother Niadra and gave her a directive to destroy the protoss, then left the moon herself.

The End War#

Kaldir once again became a battleground during the End War, when Amon used the moon as a staging ground in an attempt to ferry forces through the warp conduits and then destroy the warp network from within. Allied forces under Cartwright and his research teams were tasked with destroying Amon's forces and their shuttles before they could escape into the warp network, while Cartwright also sent teams to study the xel'naga shrines left on the world. During the fighting the moon was temporarily enveloped in a space-time anomaly.

Frequently asked questions

What is Kaldir?
Kaldir was a frozen moon of Midr IV, ranking among the coldest terrestrial locations in the Koprulu sector, with a surface temperature as cold as deep space. Ursadons and a species of extremophilic bacteria were the only two indigenous life-forms of significance discovered there.
Why is Kaldir so dangerous?
Its gaseous upper atmosphere repelled heat and blocked out most of the sunlight, and it produced flash-freezes that struck with barely a moment's warning, bringing immense temperature drops that could kill just as quickly. Resources were hard to find, and the moon lay so far from Shakuras that Khalai protoss could not use the Khala to reach it.
Why did Sarah Kerrigan infest Kaldir?
Hoping to make the Swarm stronger by evolving a way to deal with extreme cold, Kerrigan sent Broodmother Nafash to infest the moon in 2504. She later collected the essence of an ursadon matriarch to make the zerg resistant to the flash-freezes.
What happened to the protoss expedition on Kaldir?
A protoss expedition had come to Kaldir to see whether the moon's rotation could be altered and its climate improved. The zerg destroyed their psi-link spires and warp shuttles to strand them, and the protoss escaped in the vessel they had used to travel there, after which Kerrigan created the broodmother Niadra with a directive to destroy them.
What role did Kaldir play in the End War?
Kaldir became a battleground again during the End War when Amon used it as a staging ground to ferry forces through the warp conduits and destroy the warp network from within. Allied forces under Cartwright were tasked with destroying Amon's forces and studying the xel'naga shrines, and the moon was temporarily enveloped in a space-time anomaly during the fighting.

Gallery

Kaldir — image 2
Kaldir — image 3

Images via StarCraft Wiki

Sources

Spotted a factual error or a primary source we missed? Email a correction. Every flagged claim gets reviewed.

Related entries

Mentioned in7 entries

Get new articles in your inbox

No spam. New lore drops, canon conflicts, and deep dives only when they’re worth reading.

Some links on Lore Fortress are affiliate links. If you buy through them we earn a small commission at no extra cost to you.