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.
It was later discovered by two humans who had eluded Dalek capture that the Horrorkons were surprisingly docile, having only a savage appetite for metal. (ANN: Monsters of Gurnian)
- Horrorkons were somewhat similar in appearance to the Terrorkons native to Skaro.