Fenrir, son of God Loki and giant Angerboda, since the puppy lived with the gods except for his brothers Hel, goddess of hell, and the snake Jormundgander were banished. However, the only one who was able to approach Fenrir for the purpose of feeding him was Tyr, god of war.

The gods seeing their accelerated growth and the enormous size that was reaching were worried and decided to try to chain him twice but without succeeding in any of them since Fenrir only had to jerk the chains to break them, the gods seeing the The magnitude of the ferocity and strength that this possessed concluded that it was not possible to tie it with any "ordinary" chain, so they opted to ask the dwarves or black Alfes for help, who managed to create the Gleipnir, a thin, silky and thin ribbon, which No one could break and successfully tie Fenrir, but not before deceiving him by participating in a competition or challenge, to show his strength, given Fenrir's distrust of the gods he demanded that one of them put his hand inside. of the mouth as a guarantee that it was not a hoax, thus Tyr who would lose his hand to be bitten by Fenrir to discover the deception in which he had fallen and be tied without being able to escape.

But this would not be the end of Fenrir, since he was destined to escape during the Ragnarok and revenge by killing the father of all the gods, Odin.