Torngarsuk is listed as a demon or spirit in the Dictionnaire Infernal - aka. Tornatik, Torngarsoak, Torngasoak, Tungrangayak etc. is a mischievous demon/spirit worshiped by offering in Greenland and the northeastern regions of Canada.
Torngarsuk is the chief and most powerful supernatural being in Greenland. He appears in the form of a bear, or a one-armed man, or as a grand human creature like one of the fingers of a hand. He is considered to be invisible to everyone but the angakoqs (the medicine men or shamans among Eskimo peoples).
These conflicting descriptions leave us unsure as to his form, but as a grand spirit or demon Torngarsuk is invoked by fishermen and by the angakoqs when one falls ill. There are other spirits invisible to everyone but the Anguekkok, who teach men how to be happy see Torngarsuk as their benefactor when the Anguekkok call upon them they ask that if he does not come that he leave them "in the land of plenty".
Each Anguekkok keeps a familiar spirit in a leather bottle which he evokes & consults like an oracle, this familiar spirit seeks Torngarsuk in a cave and brings good fortune as well as healing power.
Tornarsuk is the head of the protective gods known as the tornat. He is also the master of the whales and seals.
Tornarsuk is depicted either as a as a bear, a tall one-armed man, a half-man and half-seal creature, or a tiny figure. Other tales describe him as invisible, that he has a body covered with eyes, or that his is a sea monster.
Torngarsuk is invoked by fishermen and by the Anguekkoks (the medicine men) when one falls ill.
The Tornaq are the familiars of shamans and called the owner of everything in nature. Each Anguekkok keeps a familiar spirit in a lether bottle which he evokes & consults like an oracle. They are usually invisible, though they sometimes appear as a light or fire prior to the death of someone.