According to Danish folklore, when a chieftain was killed in battle but never found, ravens would come and eat him. The ravens that ate the chieftain’s heart would gain human intelligence and supernatural powers. They would also become malicious and evil, leading wanderers astray. These ravens were known as "Valravn", "raven of the slain".

Other accounts speak of the Valravn as a restless soul flying through the night as a raven. One tale tells of a Valravn that helps a maiden find her lost betrothed in return for the life of her firstborn. The maiden agrees and the Valravn flies off… returning years later when the couple has had their first child. It then asks the maiden if she has forgotten her promise, proceeding to rip in to the chest of the child and drinking the blood from its heart.

According to the story the Valravn then turned in to a knight, presumably having been returned to its former life.

Campaign: “Curse of Strahd”, Dungeons & Dragons

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