bedir than
Full Moon Storyteller
Sure, if you think Blue Dragons are giant eagles with lightning eyes, that's on you.So, a re-skinned Blue Dragon, then?
If you are Morrus and looking for mythological creatures within the public domain you should absolutely look towards the myths and legends of many peoples in the worlds. Honor those people's traditions, and recognize that D&D isn't confined to the stories of western Europe and instead can embrace the tales of the Pacific Northwest with open arms.
Or, just dismiss the legends of a great land as if they don't matter, whatever.