1x05 First Shot a Winner, Lads

for those who already watched the episode:

here's a description about "the creature" so far.

Tuunbaq : a demon created millennia ago by the Esquimaux goddess Sedna to kill her fellow spirits, with whom she had become angry. After a war lasting 10,000 years, the other spirits defeated the Tuunbaq, and it turned back on Sedna, who banished it to the Arctic wastes. There, the Tuunbaq began preying on the Esquimaux, massacring them by the thousands, until their most powerful shamans discovered a way to communicate with the demon. By sacrificing their tongues to the beast and promising to stay out of its domain, these shamans, the sixam ieua, were able to stop the Tuunbaq's rampage.

Tuurngait: Some spirits have never been connected to physical bodies. These are called tuurngait (also tornait, tornat, tornrait, singular tuurngaq, torngak, tornrak, tarngek). Helpful spirits can be called upon in times of need. Some tuurngait are evil, monstrous, and responsible for bad hunts and broken tools. They can possess humans, as recounted in the story of Atanarjuat. An angakkuq with good intentions can use them to heal sickness and find animals to hunt and feed the community. He or she can fight or exorcise bad tuurngait, or they can be held at bay by rituals; However, an angakkuq with harmful intentions can also use tuurngait for their own personal gain, or to attack other people and their tuurngait. Though once Tuurngaq simply meant "killing spirit", it has, with Christianisation, taken on the meaning of a demon in the Christian belief system.

source: Inuit Mythology search.