Icemourne

This weapon is currently not actually included in the game. Attempting to obtain through the use of an inventory editor will result in the item becoming an angel statue. It is not currently known why this weapon was removed.

Trivia
there is no way to obtaining this weapon or any other removed weapons this is because its not original!
 * This sword's name and appearance is a reference to Arthas's weapon, Frostmourne, from the Warcraft franchise.