Guytan Pyrrus, Demonic Chef, is a Unique Blood Clan Sorcerer found in the Upper Realm of Infernal Fate: Arreat Crater in Act IV of Diablo III. He can be nominated a bounty.
In combat, he has the Plagued, Poison Enchanted and Illusionist affixes.
A bounty may be offered to kill Guytan, in which case the secondary objective is to kill 125 enemies.