The Mantids are an expansive and powerful alien insectoid race/empire that terrorized the universe of Io in ancient times, around the time of mortal life's first appearance in Mundus. The Mantids themselves are a race of tall mantis-like beings with two legs and four arms. They were part of the larger Highbreed Empire, where they served as one of its strongest arms.
During the ancient times of Araboth, when most organic life was still in its stone age, they and the Highbreed expanded their interstellar empire through atrocious campaigns of slaughter, terraforming, and general destruction. They completely wiped out primitive life in their path, morphed the land into breeding hives, and literally devoured space wherever they traveled. With their horrid technology they shaped worlds, destroyed them, and even obliterated space-time itself in an area of their choosing.
Towards the end of their reign, the Mantids were challenged by the Anannaki, a powerful and benevolent alien empire that rose up to destroy the destructive insects and protect all other life. After a thousand years of war, the two powerful empires exhausted each other, but the Mantids ultimately were defeated. They fled to various corners of the universe, along with the rest of the Highbreed Empire. However, they left behind many things to remember them by; from ancient technology to fossils, as well as shattered planets floating within the infinite dark.
Recently, The Highbreed and Mantids have returned, strong as ever, ready to retake their lost territory, and obliterate all they see as impure, or weak. And now, they have even begun a devastating assault on Mundus as well.