Space Worm

The Space Worm is a colossal, planet-consuming worm.

Biology
The Space Worm is a serpentine-like worm capable of traveling freely, and willingly, through the vacuum of space. Their bodies are covered in a protective scaly coating, similar to that of most reptiles but resilient enough to withstand the heat of a planet's core. While it has no eyes, its mouth is split into six mandibles lined in a star-shape.

Its main diet consist of inorganic material of numerous planets. They're able to consume a planet in a matter of seconds, burrowing into the surface, and able to withstand the planet's core as it burrows and consumes the planetary mass. This makes it an apocalyptic threat to lifeforms on numerous planets for this reason. Interestingly though, it doesn't completely consume an entire planet during a single feeding session, and will eventually leave off after it eats its fill, to consume the remains at a later date.