In games such as "Ultima Online", "EverQuest", "World of Warcraft" and "Lord of the Rings Online", mule characters often specialize in 'trade skills'. These mule characters are used to manufacture high demand goods that can be used by the player's main account, sold for profit or traded to other players for other highly sought items. Characters used to create items in World of Warcraft however can't reach beyond a certain crafting skill level until their character level is increased; in Lord of the Rings online the most sophisticated recipes are limited to players who are able to earn faction reputation in end game areas only.