Leviathan

Leviathan is a huge whale and child proxy of the Earthmother of the Moonshae Isles.

Appearance
Leviathan is a great black skinned whale, larger then any whale natural found on Toril and is fully 360 feet long. It's tail is 60 feet wide. It's mouth is full of razor sharp teeth.

It slumbers for centuries unless awakened by the Goddess.

Life Cycle
Leviathan is mortal and grows old and dies like any other natural creature. Though it is immortal in a sense, as their spirit will be reborn in time after they die.