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In page Fáfnir:

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Glaurung, another dragon featured in Tolkien's legendarium, has many similarities to Fáfnir as well. In Tolkien's The Book of Lost Tales, Glaurung is described as a flightless dragon that hoards gold, breathes poison, and has "Great cunning and wisdom".[2] In Tolkien's book The Children of Húrin, he is slain by Turin Turambar from below, much like Fáfnir. Turin and Glaurung also have an exchange after the mortal blow is dealt.[citation needed]