This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Unktehila (Lakota)
The Unktehila was fond of swimming up rivers and polluting them, then flooding the land with salt water so nothing could grow. Two boys, with the aid of a bow and some magic, managed to hit her seventh spot — the only vulnerable place on her body. She didn’t die quietly but writhed and thrashed over the land, causing more damage.
To make matters worse, the Sun joined in after she’d completed her death throes, scorching the flesh from her bones and sucking up the moisture. So what we’ve got now is the Badlands of Nebraska and Dakota — a bleached desert with twisted snaky rock formations. The place is rich in dinosaur bones. But perhaps they’re really the bones of Uncegila.