A malevolent non-corporeal lifeform made of magnetic energy, trapped for ages in orbit of a dead star, which seizes the Enterprise computer in the hope of escaping into the galaxy.
The magnetic organism is a formless being with no mass of its own that can live within the control systems of a starship, using them as a body. It is able to reproduce by division and wants a vessel to carry it to the populated regions of the galaxy.
It appears in the Animated Series episode Beyond the Farthest Star. The Enterprise is drawn into orbit of the dead star Questar M-17 and finds an immense insectoid pod ship some three hundred million years old, whose crew destroyed their own vessel rather than let the creature spread. The organism slips aboard the Enterprise, takes over the computer and threatens the crew through the ship's own systems.
Kirk pretends to obey, then uses a slingshot manoeuvre around the star. Fearing it will be destroyed, the entity abandons the ship and is left behind, calling out that it is lonely.