The Dracula Sword [Magic Item Monday] (Patreon)

This legendary sword is based on the 4e Artifact of a vampire that cannot be named due to property rights. Instead, the sword is named after the most famous vampire of them all, Dracula. It's a powerful weapon with a mind of its own, constantly praising the most powerful vampire in history. 

Like many powerful weapons, the Sword comes with a few drawbacks. You can't be surprised it comes with a curse or two, so you'll have to decide whether being able to turn into a bat is worth it.

It is a vampire sword, after all.