Correct. A fighter, preferably level 31 (since there's a pre-requisite to get Power Guard) with Power Guard, runs around the map hitting the monsters with touch damage and inflicts damage to the monsters so that another person )who is within 5 levels or more) leeches experience from the bishop who kills the entire map when the Power Guarder tells them to kill. There is also another way to use Power Guard. You go to a boss and hit it with power guard and kill the Power Guarder on the boss so that the leecher gains full experience leech from the boss itself. It is a very efficient way to level up a character.