Blackwake Rays are enormous sky-dwelling animals that travel above the open sea, drifting along pressure currents too faint for human instruments to measure.
Their bodies are broad and flattened, with dark, leathery membranes stretched across an internal frame of flexible cartilage. The largest specimens can span the width of a naval frigate. Against cloud or night sky, the animal is almost impossible to see. Its presence is first revealed when a section of the stars vanishes.
Blackwake Rays do not glow. The faint patterns sometimes reported across their undersides are reflections from stars, moonlight, ships' lanterns, or lightning trapped momentarily across damp skin.
Why they follow ships
They are attracted to the heat, vibration, and pressure discharge produced by skyships. Most follow at a distance, feeding on trace gases and warm air released through vents. A healthy Ray may trail a vessel for hours without causing harm.
A starving or injured specimen may settle directly over the hull. When this happens, sails lose wind, vents struggle to clear, and the ship begins to feel heavy. Voices become muffled beneath the creature's body, while the Éterlumin drive may lose efficiency despite showing no leak.
Shooting the animal is dangerous. A wounded Ray tightens its wings reflexively, gripping masts, rigging, and hull as though attempting to hold itself against a storm. Experienced crews reduce output, extinguish unnecessary heat, and descend gradually until the creature loses interest.
If the stars go out one by one, it is weather. If they vanish together, cut the drive.
At the table
A Blackwake encounter is a problem of ship handling rather than combat. The crew must choose between losing altitude, risking the drive, or provoking an animal large enough to drag the vessel from the sky.