Overview:

All mortals are destined to face Athreos, the River Guide, when their lives come to an end. The god of passage ferries the dead across the Tartyx River, conveying each mortal soul to its destiny in The Underworld. For most people, Athreos embodies the greatest mysteries of existence—the terror and wonder of life’s last moment and the revelation of one’s ultimate fate in the afterlife. Athreos is no judge, though. The veiled, silent god undergoes no deliberations and makes no exceptions. The River Guide reads the truth of each soul and bears it unfailingly to its proper place in the Underworld. There is no haggling and no sympathy on Athreos’s skiff, the god having heard and denied every conceivable mortal plea.

Athreos appears as a gaunt figure cloaked in ragged robes and a collection of golden masks. What little can be seen of their body is unsettling, its grey flesh stretched thin over a barely human skeleton. The River Guide is never without their ancient staff, Katabasis, which they transform into the ferryboat they use to ply the Rivers That Ring the World. Though the deity’s shrouded form gives no clue, many mortals consider Athreos to be male, but the River Guide cares for terms or labels no more than any other force of nature. Athreos can change shape but rarely, if ever, takes on other forms.

Athreos’s Influence:

Most mortals focus on the River Guide’s role in their own deaths. Countless mortal superstitions prescribe ways to garner Athreos’s favour, but all Athreos demands of those they transport is payment: a single coin of any minting or value. The River Guide has an expansive definition of what constitutes a coin, from actual stamped currency and jewellery to shiny beads or opalescent shells. Ultimately, they seem most concerned with whether a mortal has prepared for death, keeping payment ready out of respect and as a personal memento mori. Those whose bodies are burned, buried, or otherwise disposed of along with valuables deliberately intended for the River Guide discover that they can make use of such items when trading for Athreos’s services. Spirits that reach the shores of the Tartyx River unprepared, though, risk being stranded, as Athreos refuses to ferry those who can’t pay.

Athreos is also invoked as the god of passage, as well as the deity with dominion over borders, boundaries, and that which is “neither.” Those who undertake journeys, especially dangerous ones, often drop a coin into a fountain or a body of water in apotropaic acknowledgment of the River Guide. Bridges and borders are also places where Athreos is commonly remembered, with many such sites being marked by motifs of rivers or spirits. Additionally, phenomena that are neither one thing nor another, defying simple classification, are often considered to be within Athreos’s province—most notably the state between life and death, but also echoes, phantom sensations, and the feeling of déjà vu.

Athreos’s Goals:

Athreos endlessly works to maintain the balance between Nyx, the Underworld, and the lands of the living. The River Guide sees themselves as a servant of the mortal world and knows nothing of the glamour, honour, or mystery mortals often ascribe such to them. Rather, they do what must be done, and should some cosmological condition fall out of sorts, the River Guide and their servants work with silent efficiency to restore balance.

Divine Relationships:

Athreos cares little for the dealings of the other gods. As long as other deities don’t impinge on the border between life and death, either by overstepping their bounds or by trying to draw the dead back into life, the River Guide has little to do with them. More than once, this isolation has put Athreos in silent conflict with Heliod and Erebos, both of whom subtly resent Athreos for limiting how much each can meddle in the other’s realm. At the same time, the River Guide’s role as a buffer between the two vindictive gods actively prevents their grudges from exploding into divine warfare. Thassa bears a chilly respect for Athreos. In a time before reckoning, boundaries divided the god of the sea’s dominion from the Tartyx River. Though the god of the sea quietly resents sharing even a drop of water, she considers the River Guide to be a quiet, unobtrusive trespasser on her favoured element and keeps her distance. Were her respect to wane, though, Thassa would eagerly vie to control the Rivers That Ring the World.

Worshiping Athreos:

Most funeral traditions include small offerings and words of reverence to Athreos. Predominant among these traditions is burying or burning the dead with a clay funerary mask, to “frame” the identity of the dead for Athreos, and with at least one coin, so a soul might pay Athreos to ferry them to the Underworld. Some people are laid to rest with large amounts of grave goods. Memorial practices vary widely by culture, from tearful, sombre affairs to lively celebrations. These rituals serve more as catharsis for the living than as meaningful boons to Athreos, though. The River Guide cares only for the single coin they are owed by any who board their skiff.

During the feast of the Necrologion, which gives its name to the eighth month in the calendar of Meletis, pious souls silently spend the day reading ancient memoirs or writing messages for their own descendants.

Athreos’s Champions:

Alignment: Usually lawful, often evil
Suggested Classes: Cleric, monk, rogue, wizard
Suggested Cleric Domains: Death, Grave (described in Xanathar’s Guide to Everything)
Suggested Backgrounds: Hermit, sage, sailor, urchin

Most worshipers of Athreos believe death is a natural part of life, to be neither rushed toward nor run from. They seek to do their part in fulfilling the natural order, easing the passage of the living into death. Most also respect their ancestors and honour them through tradition, ritual, and memory.

Athreos’s Favour:

As all mortals eventually bow before them, the River Guide doesn’t seek worship. When mortal agents are necessary, though, Athreos often seeks the descendants of those who impressed them during their journey to the Underworld. The Athreos’s Favour table offers several suggestions for the nature of your connection to the god.

Athreos’s Favour:

1 A family member died bringing you into the world.
2 You don’t think or feel as others do, finding emotions messy and confusing.
3 In a brazen or desperate moment, you dared death to take you—and in a way, it has.
4 You sent a Returned back to the Underworld, restoring a measure of order to the cosmos.
5 Serving Athreos is your family tradition, a responsibility honored for countless generations.
6 You have died before, and in that moment, you glimpsed the mists that surround Athreos’s skiff.
Devotion to Athreos
Servants of Athreos facilitate the passage from life into death. As a follower of Athreos, consider the possibilities on the Athreos’s Ideals table as alternatives to those suggested for your background.

Athreos’s Ideals:

1 Devotion. My devotion to my god is more important to me than what they stand for. (Any)
2 Tradition. Honour the dead through rites of respect and by continuing their ways. (Lawful)
3 Dread. Mortals put their fear out of mind, but through me, they will remember the inevitable. (Evil or neutral)
4 Apathy. Life is but a rehearsal for death, and it’s best not to grow too attached to it. (Neutral)
5 Succor. I offer balm to the dying—which, to varying degrees, includes all of us. (Good or neutral)
6 Judgment. Violations against the order of life and death must be set right. (Lawful)