House Asterion

House Asterion is an old and powerful Knight House established early in the Golden Age of Technology that is known for its size and the quantity of rare knight patterns they own. They were reluctant to join with the Imperium during the Great Crusade, but were eventually persuaded to with the promise of the Mechanicum's supplies and technology. When the Emperor declared his Godhood, Procus Asterion, the current Princeps, used it as an excuse to turn from the Emperor and join the Reforged faction.

Founding
Like most Knight Houses, House Asterion was founded by a human colony ship at the beginning of the Golden Age of Technology. The ship landed on the world of Keplar 193c, and was quickly cannibalised for the raw materials needed for the colony. Included in the ship was the templates for a large variety of Knights, which were originally used for mining raw materials, but later became primarily used for defence against the native fauna on the world.

Through the use of the Throne Mechanicum, the population of Keplar 193c became increasingly fuedal, until a solid house system emerged, and the planet was renamed Nobilus Primus. The most powerful house that emerged at this time was House Asterion, led by Tharsus Asterion. All of the lesser houses of Nobilus Primus swore allegiance to House Asterion.

When the Age of Strife began, House Asterion was well prepared and able to fend of the daemonic incursion and rampant psykers that emerged on Nobilus Primus. As such, they emerged in a considerably better condition than many other Knight Houses. They were also able to preserve the STCs for the more complex and advanced Knight constructs.

The Great Crusade
When the Emperor declared his Great Crusade, the 20 Space Marine Legions spread out across the galaxy, embarking on the largest Crusade in humanity's history.