|This article belongs to the Classic Continuity|
|The images on this article are non-canon, being obtained from video games|
Due to a cataclysmic event that occurred eons ago, Kylmyys is covered entirely by glacial ice and snow, trapped in an everlasting winter.[merchandise 1]
Because of the planet's oppressively cold temperature, no corporeal creature could survive in this unbearable frozen climate. However, the Necrofriggians managed to evolve over the millennia into intangible ghost-like forms, having no solid material to freeze. In a wistful way, for even though the incorporeal Necrofriggian may be able to exist on their home planet, they can never truly be a part of it, nor any concrete world.[merchandise 1]
Kylmyys is Finnish for "cold".
Various tracks located on Kylmyys exist in the game.
- Originally, the Necrofriggians were the only living beings on Kylmyys.[merchandise 1] This was retconned in Omniverse with the introduction of the Psycholeopterrans.