Minecraft wiki entry for Combat, associated text: The third type of illager, they don't spawn naturally, and must be summoned by the player(s). They have the ability to blind the player for 20 seconds, and can even spawn duplicates to fool them. These duplicates move in the same way as the regular mob, but real illusioner is invisible. The illusioner attacks with a bow. Due to it dealing poor damage, illusioners are more of a nuisance than deadly. It drops the occasional bow on death. It's recommended to use a bow for this mob, search where real arrow comes and hit in that direction until the player finds the real illusioner as duplicates are the same distance from the invisible real illusioner. When the player is blinded, it's best to back away, waiting for the blindness to disperse, then attack again. You could also drink a bucket of milk to remove the blindness. Splash potions of harming are great. Since they deal area damage, it will kill the illusioner in a few hits without having to search the real illusioner.