What is the fine-grained topic of the following text: Originally he was supposed to give a quest to kill Or'kaos the Insane upon a player reaching Exalted with the Netherwing in order for him or her to obtain a netherdrake mount; but the idea was replaced with  Lord Illidan Stormrage. Only return the topic.
Changes in Netherwing quest for obtaining a netherdrake mount in a game