Rogue Trader - The Koronus Expanse
The Great Eater
An unknown threat that attacked the Mant millennia ago and forced them to create the Veil in order to protect themselves. During Mordechai’s conversation with the Many-Lived of the Mant he was shown a vision of a planet overrun by shadows, shadows with eyes. From the shadows came Mant bodies seemingly puppeteered by the shadow and creatures made of nothing but shadow come to life.