Read more about Ancalagon at: Wikipedia

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Besides dragon (derived from French), Tolkien variously used the terms drake (the original English term, from Old English draca, in turn from Latin draco and Greek ) and worm (from Old English wyrm, "serpent", "dragon").

Dragons are already present in The Book of Lost Tales. Tolkien had been fascinated with dragons since childhood. As well as "dragon", Tolkien called them "drake" (from Old English draca, in turn from Latin draco and Greek ), and "worm" (from Old English wyrm, "serpent", "dragon"). Tolkien named four dragons in his Middle-earth writings. Like the Old Norse dragon Fafnir, they are able to speak, and can be subtle of speech.

In the earliest drafts of "The Fall of Gondolin", the Lost Tale that is the basis for The Silmarillion, Morgoth (here called Melkor) sends mechanical war-machines in the form of dragons against the city; some serve as transport for Orcs. These do not appear in the published Silmarillion, edited by Christopher Tolkien, in which real dragons attack the city. As in the later conception of the dragons in the Legendarium, the winged dragons had not yet been devised by Morgoth at the time of the Fall of Gondolin. The first winged dragons were coeval with Ancalagon the Black.

In the late Third Age, the dragons bred in the Northern Waste and Withered Heath north of the Grey Mountains.

Ancalagon has not been a contender in any CBUB matches.