Glaurung and Nienor by Miruna-Lavinia on DeviantArt

A painting of the death of Glaurung, the first dragon of Morgoth, by artist Elena Kukanova : r/lotr

nienor and glaurung by nienor on DeviantArt

Nienor meets Glaurung by noei1984 on DeviantArt

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Glaurung and Nienor by Erevia on DeviantArt

Smaug and Bilbo by Dendroabates on DeviantArt

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Death of Glaurung by RenatoCDomingos on DeviantArt

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dailydragons: Nienor and Glaurung by Elena Kukanova (website, DeviantArt)