The Questing Beast, also called Glatisant, or The Barking Beast, is a strange and unique creature pursued by King Pellinore It has never been caught, and has never been known to attack when pursued, simply outpacing and avoiding all pursuit.

The strange creature has the head and neck of a serpent, the body of a leopard, the haunches of a lion and the feet of a hart. Its name comes from the great noise it emits from its belly, a barking like "thirty couple hounds questing".

The ghostly sound of hounds comes from inside the belly of the Questing Beast; though the beast is masterful at fleeing and hiding, the noise always betrays its hiding place eventually, allowing its pursuers to stay on its trail. Glatisant appears to live to be hunted, but not to be caught