It could be the Hydra but is it is, it's a case of Did Not Do The Research. The Hydra had 3 heads originally, but when Herakles decapiated them, three heads grew from each neck (hence it's often depicted with 9) Realising what was going on, Herakles used a torch to cauterize the stumps when he decapitated those 9 heads.
If I'm not mistaken, in the myth, the Hydra lived in a swamp of sorts, it's also known as a serpent and with no known abilities to fly, so I have to go with Tiamat with this one. You are welcome to correct me if I'm wrong.
