THE BATTLE OF FENRIR AT RAGNAROK. Fenrir ( Old Norse) Fenrirsulfr (Old Norse) also known as Fenris-wolf. Is the infamous Grey Wolf whose jaws reach from the ground to the heavens, he watches Valhalla and slays Odin at Ragnarok. Fenrir is the son of Loki and Angrboda, brother to both Jormungandr and the underworld goddess Hel. In order to control Fenrir and to prevent him from wreaking havok and chaos throughout the nine realms, the Aesir gods took it upon themselves to raise this loathsome beast. Fenrir grew extremely fast, this troubled the gods greatly and tired of being terrorized to no end they decided to restrain him. After two unsuccessful attempts they tried to trick Fenrir by convincing him it was a game to test his strength. The dwarves forged the strongest chain ever made, it was deceptively light, soft to the touch and Fenrir wanted no part of it. After Tyr who was the only god that agreed to put his hand in Fenrir's mouth as a show of good faith then did the suspicious beast let the gods bind him. When Fenrir discovered he could not break free, he became more angry than ever and ripped Tyr's hand from his arm. The gods quickly tied the chain around a boulder and put a sword in the wildly and ceaselessly howling beast's jaws to hold them open. The foamy river that flowed from his drooling mouth was named Expectation. Just as the name implies this was not the end of Fenrir. Sure enough at Ragnarok Fenrir managed to break free and consume everything in his path from ground to sky. The above image is the Battle of Fenrir at Ragnarok that reaches from the ground to the heavens and consumes the sky.
References
Skjalden.com The Nine Realms in Norse Mythology https://skjalden.com/nine-realms-in-norse-mythology/
Norse Mythology.org https://norse-mythology.org/
Myths of the Norsemen - H.A. Guerber www.doverpublications.com
The Little Giant Encyclopedia of Runes https://www.amazon.ca/Little-Giant%C2%AE-Encyclopedia-Runes/dp/0806949945
Anglo Saxon Runes https://www.arild-hauge.com/eanglor.htm
Jelling Stones, Nordic Elder and Viking Age Runes http://www.runforum.nordiska.uu.se/runecast/episode-3/
Runic Codex https://www.apmanuscripts.com/special-collection/codex-runicus
Uppsala Universitet / Institutionen för nordiska språk https://www.nordiska.uu.se/
Northern Paganism https://www.northernpaganism.org/shrines/holda/about.html
Nine Sisters https://www.northernpaganism.org/shrines/ninesisters/ran/honoring-ran.html