Zhar the Mad (Diablo I Quest)
This quest involves an irritable mage who has secluded himself on level 8. The mage, Zhar the Mad, will himself initiate the quest when approached. He is found in a magic library containing several scrolls as well as a bookcase. He will give the hero a spellbook and tell him to leave. Attempting to take the book on the bookcase will infuriate Zhar, and he will attack. Since he is of the Counselor enemy type, he teleports around the room, shooting firebolts at the hero. He may also use the spell Flash. Defeating him completes the quest.
First Encounter: "What?! Why are you here? All these interruptions are enough to make one insane. Here, take this and leave me to my work. Trouble me no more!"
Second Visit, or after checking the Book Case: "Arrrrgh! Your curiosity will be the death of you!!! (laughs)"
Player: "I'm sorry, did I break your concentration?"