A consumable item used to increase your soul count.
You can consume the Soul of an Unknown Traveler to gain 800 Souls.
You can find these souls near bodies they once owned. Unknown travelers abound in these lands, and some of them – even in death – stay close to where they experienced their final demise, unaware of their parting or simply guarding their bodies.
Some may even be there waiting for a traveler worthy enough to embody their vengeance.
The Unkindled, as a prime vessel for souls, is a great tool for vengeance.