K'Thoutek

K'Thoutek is a large comet in Realmspace that circumnavigates the sun in an extremely elliptical orbit. Its only remaining inhabitant of a once large group of oortlings is their greatest wizard, now an undead haunt bent on revenge against the illithids who destroyed the colony. The appearance of comet K'Thoutek is seen as a sign for the birth of a powerful person by astronomers on Toril.