Entity: Undead Slayer

Source Book of the Dead pg. 28

Anywhere undead prey upon the living, some brave souls make it their mission to destroy the monsters. Many adventurers are skilled at dispatching undead, but you go a step further. You study them, learn their weaknesses, and master the tools to end them quickly and cleanly. An undead slayer doesn't simply kill monsters; they become what even monsters fear. Leave it to others to be a shield—you become the blade that strikes evil at its heart. You can identify the common types of undead by sight. You drill and practice with the special gear necessary to destroy some of the more complicated undead, like vampires; train in their strengths and weaknesses; and learn how to create safe houses to stash your arsenal and hide from undead.

Some undead slayers work at the behest of an organization to exterminate the undead of a particular region, but many act independently, or in a group of like-minded adventurers. Were you called by a higher power? Are you on a personal quest for vengeance? Whatever the reason, you now walk a path that will take you to the vilest dens of rot and decay