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Runespoor eggs were produced through the mouth of a Runespoor, and was the only magical beast known to produce eggs in such a manner.[1] The eggs were known to stimulate mental agility, and as such, were used as potion ingredients,[1] such as in Baruffio's Brain Elixir[2] and Scintillation Solution.[4] They flourished on the black market for several centuries.[1]

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