Graxis was a cursed minotaur who used to guard Xander Huorath's tomb at the Necropolis at Telemok.
His clan once served Rizon Phobas, before being oath sworn to guard Xander's tomb. This oath became a curse, however, preventing the minotaurs from both leaving or sleeping. Over time, Grazis slowly succumbed to madness; and, in order to save the rest of his clan from their fate, Graxis killed them.
By the time the Oracle's Chosen met him, he was too far gone to reason with, and they had no choice but to kill him despite their best efforts.