Wizard Grayzag is a wizard and necromancer on the 2nd floor[UK]3rd floor[US] of the Wizards' Tower, outside the lesser demon cage. He seems to have a grudge against Wizard Mizgog, who stands across the hall from him, as he summoned imps to steal items from Mizgog. During the Imp Catcher quest, the player is tasked with retrieving some of the items the imps have stolen.
When Evil Dave began learning 'demon-summoning', he asked Grayzag for help summoning imps, but ended up summoning an even lower level of demon: Hell-Rats.
This article on an NPC has an associated dialogue page. Click here for a transcript of possible conversations with this NPC. Click here for a list of other transcripts that this NPC speaks in.
He was once attackable, with a combat level of 41, summoning imps to assist him in combat. This was changed when the Imp Catcher quest was reworked on 4 July2006.
He has a courier task requesting for pest remains to be delivered to him. This is a reference to the Void Knight quest series in RuneScape 3, where he serves as the main antagonist, summoning and controlling the Pest Queen.