How do I get Slayer Amulet

[PotatoKat]

I've become what I fight, vampire so I went to the sea at the heart of the world... But the Apothecary tells me to get the amulet of slayer but where do I get one?

 

[Gappydave]

Have you tried talking to the slayers. They spawn in the place of manhunters at a certain level. Maybe level 20.