Fenrir or Fenrisulfr or Hroovitnir are wolf monsters. Father of Skoll and Hati Hroovitnisson, eldest son of Loki and AngerBoda.
Unlike his brother Jormungandr who was thrown into the sea and his sister Hel who was banished to Nifleheim, Fenrir was not banished, even Aesir took Fenrir home. Only Tyr was brave enough to approach and feed Fenrir.
The gods realized that Fenrir was growing rapidly every day, and knowing the prophecy that Fenrir was destined to harm them, the gods devised a plan.
The gods prepared Three bridles: The first, very strong, was called Leyding. They took Leyding to Fenrir and suggested the wolf try his strength.
Fenrir felt that their control was still within their limits, and let the gods do whatever they wanted. At the first kick the reins broke, and Fenrir broke away from Leyding.
The gods made a second bridle called Dromi. The gods had Fenrir try a new harness, and if he managed to break free, he would be famous for his strength.
Fenrir felt that the reins were very strong, but his strength had also increased since he decided against Leyding, and indeed he had to take risks if he wanted to become famous. Fenrir allowed them to take control.
When Aesir declared that they were ready, Fenrir shook his body, slammed the reins, pulled as hard as he could and with a kick from his leg, shattered the reins into pieces that flew away.
Aesir was beginning to expect that they wouldn’t have the option to limit Fenrir, so Odin sent Frey’s agent to Svartalfheim to some dwarves and requested that they make Gleipnir.
The dwarves made Gleiphnir from the Six mythical ingredients. Gleiphnir is also finished with a bridle that is smooth and soft like silk ribbon, but strong and sturdy. The messenger took him to Aesir.
Aesir went to Lake Amsvartnir (Old Norse, pitch black or total darkness), with Fenrir and then to Lyngvi Island.
The gods showed Gleiphnir to Fenrir and told him to tear it apart, saying that the reins were stronger than they appeared, and that each one of them was pulling it and not breaking. But they said that Fenrir would be able to destroy it.
Fenrir replied by saying:
*Smooth and soft bridles like this Ribbon would not make me famous if I tore and crush them, But even though these bridles looked thin but complicated, they would not tie my feet.*
The Aesirs persuaded Fenrir by saying that he would be able to tear a piece of thin ribbon like that, and added that if Fenrir couldn’t tear the delicate Gleiphnir then Fenrir wouldn’t scare the gods, and he would be freed.
Fenrir answered and said:
*If you tie me with this bridle and I can’t get away then you will stand and laugh at me and I will wait a long time until you help me, for that I refuse to tie me, but if you question my courage then let someone put their hand on my mouth, as a guarantee. that it was based on goodwill.*
Hearing this, the Aesirs were in a dilemma until finally Tyr put his right hand on Fenrir’s jaw.
At the point when Fenrir revolted, Gleiphnir held him firmly, Fenrir who was more grounded, Gleiphnir who was more tight. The Aesirs laughed except for Tyr who lost his hand.
When the gods learned that Fenrir had been shackled, they took the hook called Gelgja hanging on Gleiphnir and placed it on a stone slab called the Gjoll (Old Norse, Scream or roar) and the gods buried the stone in the ground.
Fenrir went on a rampage and opened his jaw wide to bite the gods.
The gods thrust their swords into Fenrir’s mouth. The grip is on Fenrir’s lower gum while the tip is on the upper gum.
Fenrir howled horribly, his saliva pouring out of his mouth and forming the river Van (Old Norse, hope). That’s where Fenrir will wait until Ragnarok.
The reason the gods didn’t kill him was because they didn’t want their holy place to be covered in wolf blood even though they knew about the prophecy that he would die for Odin.