The people of Khorvaire recognize death as a natural part of the cycle of life. The Keeper, however, embodies the violation of that natural order. Said to be the twin brother of Kol Korran, he feeds on the souls of the dead and hoards them in his domain the way that his brother hoards material wealth. He is said to inspire the depredations of the undead, unexplained occurrences in graveyards, and plagues and similar afflictions.
The Keeper is known as Kol Turrant to some of his most devoted followers.
Source: Player's Guide to Eberron
Province: Death, greed, hoarding
Suggested Cleric Domains: Death, Trickery
Suggested Paladin Oath: Oathbreaker
Every Vassal knows they should never flaunt good fortune, avoiding arrogance and pride. Those who crow too loudly may catch the jealous eye of the Keeper. Even the mightiest hero can be laid low by disease or ill fortune, as the Keeper has a vast arsenal to bring down those that he desires. Once he pulls you down into the darkness, he will snatch your soul before it can reach Dolurrh and add you to his endless hoard, where he can toy with you and torment you until the end of time.
The Keeper is the patron of those who put personal gain above all else. He guides those who use guile to gain gold, regardless of the cost to others. A rogue who invokes Olladra sees themselves as the hero of the story; one who calls on the Keeper has no compunctions about being the villain. Beyond guiding those who place profit before all else, the Keeper is also known for his willingness to make deals—though his bargains are always slanted in his favor. Priests known as Talons make these deals on behalf of the Keeper, though the terms are often abstract and driven purely by faith. An entertainer could bargain with a Talon, exchanging ten years of their life for fame; even if the entertainer subsequently becomes famous, there’s no way to know if this is the result of the bargain, nor to anticipate when the entertainer might suddenly die. This could easily be a part of the backstory of a player character. Did your entertainer make a bargain with the Keeper?
Another possible path for a player character or deadly NPC is that of being a Keeper’s Fang. These people receive visions of things that the Keeper wishes to add to his hoard; these are usually the souls of specific people, but they could also be artifacts or other unique treasures. This is an interesting path for an Assassin rogue, an Oathbreaker paladin, or a Hexblade warlock (from Xanathar’s Guide to Everything).
Source: Exploring Eberron
“The Sovereign of Death and Decay,” Neutral Evil
Another of the second divine generation, the Keeper is the son of Olladra and Onatar, and the flip side to his twin brother, Kol Korran. Where his brother is the patron of material wealth, the Keeper governs shameless greed and gluttony. He is the hunger in the dark, clutching at anyone or anything that strays too far from the light. It is said that of all the gods, he alone can waylay the deceased on their journey to Dolurrh, and no soul once ensnared can escape the Keeper’s chill embrace. He is the patron of death cults all over Eberron, and in this capacity, has become the unofficial god of the religious necromancer.
Portfolio: Death, entropy, greed, hunger, time.
Domains: Death, Decay*, Evil, Greed‡, Hunger‡, Pact‡.
Priest Training: Servants of the Keeper must have a working knowledge of life and death; disturbingly, many of his priests were once healers.
Quests: Quests in the Keeper’s name often consist of killing someone or something specific, usually with a Keeper’s fang weapon (ECS 226), but some revolve around discovering some mystery or acquiring an item of great value.
Prayers and Rites: Sacrifices to the Keeper almost always require ending life in his name. They range from breaking a rabbit’s neck to beheading multiple sentient creatures, depending on the importance of the rite.
Shrines: The Keeper’s shrines are constructed of stone, and many are underground, in tombs, or both. Personal shrines often include a decorated skull.
Favored Weapon: Scythe.
Holy Symbol: A Khyber dragonshard in the general shape of a fang.
Source: Faiths of Eberron