If you're bored, check out the little Pug dog in the Stormwind keep gardens, it's level 91 and has 10M health. It is only a tiny dog, but he bites. HARD. Don't believe me? Go see for yourself. The pug goes by the name Crithto and usually wanders in the gardens. If he's not there, he will be within 10mins supposedly. He is attackable, however i don't advise it, unless you have a group of people. He may be small, but he bit me for 157k and instantly killed my healer. So if you're bored, get a few friends together, and try to kill him.