Willpower represents long-term mental fatigue. Like endurance, it will also go up and down naturally as you make use of mental abilities. When you run out of willpower, you will lose access to those abilities and will fall unconscious for a short period of time. You can recover your willpower by using MEDITATE, and will also recover based upon your statpack, race, and the Philosophy miniskill. Other ways of recovering your willpower can be accomplished through certain abilities and items found in the world.