Oda is just fucking plagiarizing Norse mythology, even the names are unchanged lol. My theory about Shanks tricking Loki will turn out to be correct, just watch.
Shanks (Tyr), a god (Celestial Dragon), will convince Loki to put himself in chains. This is what happened to Tyr and Fenrir (son of Loki). The fact that Loki mentioned that no man willingly puts himself in chains makes me believe that it’s the opposite of what he was saying lol. This was a foreshadowing by Oda.