Ferrymen

Ferrymen are magical practitioners who facilitate soulfaring
Whether it happens in a dirty shack on Blood Alley or a silk-draped room on the upper floors of Madame Xanthia's Pleasure Palace, a soulfaring journey always starts with a Ferryman administering some catalyst and performing a ritual. The catalyst is usually a potion of some sort (ranging from acrid sludge to delicious spiced wine), but some Ferrymen use cakes and other foodstuffs, special incense, and other methods. A common story claims that soulfarers in faraway Shangri-Thul are sent on their journey through the bite of a snake whose venom holds the power to send a victim's soul out into the ether.
Regardless of the method, the purpose of the Ferryman's craft is to send the client's soul out of his body and into another realm of existence. A good Ferryman knows the proper mixtures and rituals to send the soul exactly where it wants to go. These travelers often return to the waking world with stories of amazing adventures, mind-altering revelations, and ecstatic experiences. Other Ferrymen are less precise, potentially sending a traveler on a hellish journey through some nightmare realm. Some of these unfortunates return "soul-shattered" and broken. Others don't return at all.