The World Serpent, Jörmundgarden

Among the branches of the world tree, there lives a gigantic dragon, of the Wyrm type, of legendary character, whose objective is to ensure the protection of the tree, and the correct maintenance of it. To satisfy its voracious appetite, the snake has no choice but to eat itself, so it results in an infinite cycle of the snake eating the tail, it is said that from so much devouring itself the snake acquired the power to be able to see his birth and death, that is, seeing the past and predicting the future. The serpent waits quietly in the tree until the arrival of Ragnarök, whose task will be to poison the skies, and await the arrival of the Riders to put an end to their insatiable hunger.