Deathlock | Pact of the Hexblade

Many people swear by the blade. Many more die by it. But to be brought back from the dead and continue to enact it's twisted will? The fate of Hexblade Warlocks who go back on their word is that of a misty apparition, whose soul has now been claimed by the shadowfell.
Their Existence can only be described as a tear between the material plane and the shadowfell.