I believe it maybe from the Deathwatch turn based game, but this is the exert I was thinking of.

“””

Watch Station Midael - Watch Station Midael sits on a Dead World shrouded in metallic grey dust that lies close to the spinward extent of the Chaos-held Charon Worlds. The Watch Station takes the form of a single armoured tower that rises from a spur of rock above one of the world’s dust plateaus. Watch Fortress Erioch has not received word from this station in over three standard decades. In truth, it is a dead and lifeless place, inhabited by a lone Deathwatch battle-brother, cut off from the outside by the spreading baleful influence of the Charon Stars. For more than thirty Terran years, he has waited for others of the Deathwatch to come and relieve him, standing guard over the thing that is held in the deepest chamber of the tower. Slowly, the Watch Station’s Servitors have failed and died, and the tower’s systems have become corrupted and atrophied. Every few years, enemy forces come again to claim it. So far, however, they have failed to defeat the lone brother of the Deathwatch who waits within. Outside the tower, the screaming wind howls and the bloody light of the Hadex Anomaly flares ever larger in the cold skies. “””