1. in The Hobbit, Dragons are called Worms
2. in The Hobbit, Legolas's eyes glow a Fremen blue
3. in LoTR, after the last Great Worm is dead, Legolas's eyes no longer glow
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In the talmud, he was one of the three who knew the art (the others were Jacob and one of king Saul's sons): https://en.m.wikipedia.org/wiki/Kefitzat_Haderech?wprov=sfla1 … (the English article mentions there's three talmudic stories but doesn't say what they are, the Hebrew version goes into more detail).
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