Norse has a nice ending nit gonna lie. Everyone dies. Thor kills Jörmungandr. Jörmungandr kills Thor. Fenrir kills Odin, was it Tyr to who killed fenrir?
Tyr and Fenrir were the most loyal companions.
Fenrir, son of Loki, was captured by gods and they tried to tame, or at least to chain him up. Non known chain could keep him locked, he destroyed everything with ease. They then tried to use even non existing materials to chain him down, like sounds of cat footsteps, but he outgrew even them with ease. Amused, Fenrir made the gods an offer. If they show him trust, laying their hand into his mouth, he will show them trust and follow them. All of them refused, they knew he is lying, he even is the son of Loki.
Fenrir made himself lose again by the chains, then Tyr stepped in front. He smiled, put his hand/arm into Fenrirs mouth and looked him straight up in the eyes. Fenrir bite of his arm in one chop and then asked Tyr why he did it, since he saw in Tyrs eyes, Tyr knew he will lose his arm. Tyr answered: “Because I show you my trust. You never said you wont bite the arm, but you offered your trust.”
Fenrir growled, but he started to follow Tyr, didn’t attacked the gods again, but made sure, from that moment, Tyr would never lose any fight again.