Fanatic is an infected Goblin that appears in the Vault of Glass. When these Vex touch a player, they will explode, dealing massive damage. When they are killed, they leave a medium-sized green puddle on the ground. If a Guardian steps into the infected puddle, they are marked for negation. If a Guardian is marked, they must either be cleansed by a relic, or the lit circle in the center of the room. Uncleansed players will be killed when The Templar fires his Ritual of Negation.