Hey in my defense we have sort of zombies, sort of ghosts, sort of vampires and whole other sort of kinds from other parts of the world. Would it be that surprising to have soething that's sort of resembles a dragon? 
Sort of like this :

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[img]https://vignette2.wikia.nocookie.net/darksouls/images/f/f1/Gaping_Dragon.png/revision/latest?cb=20130807151818[/img]
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