The Headhunter

From publisher blurb: Headhunters are warriors who decapitate their foes — during or shortly after combat — and carry their heads as visible proof of their triumph. Some headhunters, the greatest among them, can trap a little of their victims’ essence in their heads, and can use it to replicate their foes’ unusual capabilities. Included in this product are a new prestige class, three archetypes, a new oracle mystery, and a magic item to protect the wary from having their head removed.