Doomblade (Carallion Supplement)
From D&D Wiki
The Doomblade is a legendary sword.
Little is known about its origins and several stories exists of its creation and purpose. Some believe it was forged by the Gods and that it will be used against them in the final days. Others believe it was created by various powers to destroy the Gods.
The Doomblade is described as a simple sword, unadorned, yet perfect in its proportions and unmistakable as a weapon of great power.
It is believed that the current wielder of the Doomblade is the Slayer, a mysterious and unstoppable warrior.