A "600 monk" (or simply a "600") is a type of invincimonk who can have more than 55 HP. It is a common misconception that they need 600 or more health, but in reality they can work with nearly any amount. As with most invincimonks, this type of build is mostly used for farming. 600 monks make use of the skill Spirit Bond to stay alive. For this reason, they are sometimes called Spirit Bonders.