The Slender Blade is a long, silver, double-edged dagger with a marble handle that can be used to kill Slenderman, his proxies, and other supernatural creatures. When the blade is used to kill the Slenderman, he will bleed white blood, then finally explode in a shower of white goo, but unlike other normal human weapons used to try to hurt the Slenderman it will drag him and his proxies along into PURGATORY