Spite

Spite, a two-bladed sword of acid and frost, was crafted by Mannoroth, a pit lord general of tremendous power, and given to Azgalor as a perfect tool for destruction. It was forged with the spirit of a lesser demon trapped within and is now an intelligent weapon (barely). Spite cannot communicate with its wielder, though the wielder always feels a slight urge to spread blight and destruction. If Spite wins an ego battle, the possessor's sole goal becomes the spread of blight and destruction.