Crystallos

Crystallos is a deadly icy death world and Space Marine Chapter Homeworld of the Ice Dragons Chapters. A bleak and inhospitable world with extreme cold temperatures and an extremely harsh environment, this deadly ice world suited the unique physical requirements of the Ice Dragons Astartes, for their severe genetic idiosyncrasy causes them to rely on sub-zero temperatures for survival. Surprisingly, there is a small population of humans who have managed to survive and thrive despite this world's deadly environment. Claiming this world and the surrounding system as their demesne, the Ice Dragons have continued to maintain their vigil near the Eastern Fringe to defend mankind from any xenos incursions from beyond the frontiers of the Imperium's borders.