I think i would have to go for a dragon (yeah its not the most interesting of choices but its a dragon and i'm welsh)
Im sure the flood can come up with a little better and more interesting
[url]http://en.wikipedia.org/wiki/List_of_legendary_creatures[/url]
Here's a wiki list for inspiration
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Moro from Princess Mononoke, although I think Moro is supposed to be a deity but what ever she's still my choice. That or something that can fly.