Hajime Isayama has inserted here and there in the world of The attack of the giants, several references to the real world and its myths. If we got to know Marleyans similar to the Romans a few chapters ago, while the Eldians are instead identical to the barbarians, the Mangaka in the chapter of July 2020 was made even more Nordic culture.
In Chapter 130 of The Giant's Attack, we saw the colossal giants' march, followed by Eren Jaeger with a monstrous appearance. The end of the world seems near and many references go back to the myth of Ragnarok, popular in Scandinavian mythologies.
Miðgarðsormr is a snake, also known as the Jormungand, sworn enemy of the thunder god Thor. This has an almost infinite length and could completely envelop the earth with its turns. In the myth, Miðgarðsormr lives in deep waters and would be an ambassador for the arrival of the Ragnarok: the snake will emerge from the water and contaminate the whole world with its toxic breath and kill everyone.
One of the first parallels that comes to my mind is how both the serpent and the colossal giants (with Eren behind them) emerge from the water with unprecedented violence and then begin to kill those on land. The second node is in the snake's poisonous wind, shown this time metaphorically by the hot steam cloud that continuously envelops the colossal giants and that it burns everyone who gets hit.
Finally, the serpent's windings wind around the world and The same thing happens with the marchWith that in mind, in the final table of The Attack of the Giants 130, looking up, you can see the curvature of the earth and the forces of the giants expanding in a circle. This continues the references to Nordic culture. Did you find others with the manga in previous dates?