Horrorkons were two-headed, monstrous creatures native to the swamps of Gurnian. Originally believed to be vicious and unruly, the creatures were kept in check by patrolling Marsh Daleks.
A Horrorkon within the swamps of Gurnian.
It was later discovered by two humans who had eluded Dalek capture that the Horrorkons were surprisingly docile, having a savage appetite only for metal. (COMIC: Monsters of Gurnian)