There is a current lack of a classical anti-vampire stake in the game.
The inclusion of a Wooden Dagger (Stake) would allow for potential future system such as:
- Discovering Inert NPC vampires during questing.
- Using Wooden Dagger (Stake) to classically deliver a Killing Blow mechanic.
- NOT using a Wooden Dagger (Stake) allowing the vampire to (gaseously / bat form) escape permanent death.
It would be my suggestion that the dagger is created as a /tool/ rather than as a +X vs vampires weapon.