Penumbral Hydras

The Penumbral Hydras are a Renegade Space Marine Chapter believed to have beeb born from the conflict known as the Fall of Mobidium. Born from the same genetic template as the Novus Krakens and Leviathans Eclipse Loyalist and Heretic Astartes respectively, the Penumbral Hydras are an extremely secretive Astartes Chapter whom evade catalog by the greater Imperium as much as possible.

History
The chapter's personal history begins with the Fall of Mobidium. While the Novus Krakens and Leviathans Eclipse fought for complete dominance over Mobidium, the Homeworld of all three chapters, the Penumbral Hydras formed in secret to collect and preserve the histories from which all three organizations stem from. After Mobidium was desolated, the Penumbral Hydras remained in the background and watched for the Novus Krakens to leave their now defunct homeworld behind.

When the Krakens did indeed leave Mobidium, the Hydras emerged to establish themselves on the world. For, in the depths of the histories, there were tales of an ancient and powerful Trident that rested in the deepest depths of Mobidium's oceans. The Penumbral Hydras sought the weapon, to preserve and recover its mighty tales.

When the Hydras did find the Trident, all attempts to recover and move it were met with fierce resistance from the weapon, or so it seemed. All attempts to remove it from its anchored position in the now null-ocean dead world failed, and some attempts ended in the complete termination of an Astartes' life. There was a pattern, however. For, those who died to the weapon's touch were later found to have been keepers of some relics or trinkets of chaotic nature. The Chapter's scant Librarians have tried to extract understanding from its evasive nature, and have learned little.