Exterminate Undead is a powerful spell from Standard Spellbook that requires a Magic level of 93. It can hit a maximum of 450 life points (under the right circumstances though, it can hit up to 550 life points). It can only hit undead monsters, such as Shades, Zombies, Skeletons, Ghosts, low-levelled Revenants, Zogres and Ankous. It does not work on the Barrows brothers, certain high-levelled Revenants, mummies, Count Draynor, or Nazastarool. When casted, the spell hits all enemies in a 3x3 area, making it ideal for killing multiple undead enemies.