The ancient Lakota tribes of the Northwest had heard rumors from neighboring tribes that a Giant Evil Spirit had emerged from the icy waters of the far Northeast Atlantic. In time the creature and its companion had fought their way across the eastern coast into the midwest, with many different tribes finding ways to scare off the monsters. Until they made their way to the
Black Hills (Ȟe Sápa) and sought a new home in the mountains. Once she and her companion arrived and made a place in the mountains. She coexisted with everyone, from the tribes to the Wamakaskan and the other spirit beings. During this time she and her companion began to prepare to spawn offspring. Many different Tribal Clans and Nagi that lived in the Black Hills learned of the monsters' plans and began making plans to prevent anymore monsters from becoming a threat. Unk Cekula and Unk Tehi coexisted with nature because they were only two that were sustained by nature, but if there were more monsters that needed to kill for survival it meant that more animals and people would die to feed them. This forced everyone to act, before she became the cause of chaos and fear. Over the many years in which she wreaked havoc in the hills, she was challenged by many warriors from the Lakota tribe. It was learned that the creature had offspring, and the tribes had to kill them when they began feeding on people. In one myth, Unk Cekula fights with and kills a giant bear, whose fallen body produced the
Bear Butte in the Black Hills. She was slain after she ate the family of a great warrior from the bear clan. This warrior was told by a Weasel spirit that if he was to get swallowed by Unk Cekula, he could use his knife to cut his way out of the belly of the beast and free the other victims.. Alternatively, two twin brothers, one of whom was blind, killed Unk Cekula using arrows given to them by a medicine woman. Some accounts state that the brothers' arrows did not kill Unk Cekula, but only injured her so greatly that she damaged the land as she writhed away. As she finally died, the
Sun scorched her flesh and dried up the land, resulting in the arid rock formations and skeletons found in the
Badlands (Makȟóšiča). In another myth, Unk Cekula emerged from the primordial waters to flood the land. The resulting devastation angered
Wakinyan, who flapped his wings to create a great storm to dry up the land and shoot lightning, killing Unk Cekula. Her heart was destroyed, but her bones were scattered across the land. ==In popular culture==