In Forgotten Realms, few things are as feared and iconic as the Dragon. There may be more powerful beings, but few of them are well-known. The Dragon is decent on land, a powerful flier, some even report them swimming. They have armored hides, energy breath weapons, are masters of their special environment, and the older ones are often skilled with magic.
What I'm looking for must fulfill three or more of the following qualifiers:
- 10 to 20 times taller at the shoulder
- able to teleport, fly in space, or traverse the Astral Plane
- has a natural weapon that makes fire breath look as ineffectual as a bow and arrows
- natural defenses that make dragonhide look as weak as squishy human flesh by comparison.
Does a creature exist in the Forgotten Realms, however rare or far apart its visits may be, that is a threat to the Dragons in the same way that Dragons are to humans?
To be clear, the idea is for it to be more than just a "bigger, stronger dragon" in a literal sense.