Demolish Undead

Demolish Undead requires a Magic level of 62 and can hit a maximum of 300 life points (under the right circumstances though, it can hit up to 450 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.

Demolish Undead costs 489 coins for each cast, if no staff is used, but an earth staff is recommended in free-to-play. This brings the price down to 195 coins per cast. Members can use dust runes which brings the price down to 145 coins for each cast, also allowing them to use equipment such as the Staff of light and an Arcane stream necklace to give up to a 30% max hit boost.

Trivia

 * Attempting to cast Demolish undead on anything that is not undead will give you the message "This spell only affects skeletons, zombies, ghosts and shades".
 * Despite Banshees being Undead, Demolish Undead cannot be used against the Banshee Champion underneath the Champion's Guild. As previously stated, it brings up the message, "This spell only affects skeletons, zombies, ghosts and shades"