The Mad skavid is a Skavid that has become deranged, either through being worked too hard by his Ogre masters or through some torture, and is found in a cave in the heart of Gu'Tanoth.
During Watchtower Quest, the Player must speak to the Skavid in his native language, at which point he will say "Heh, so you speak a little Skavid eh?" and give you the pink crystal needed to power the Watchtower and complete the Quest.
