"W..what is this place?" asks Arthur,

"Humanity's demise, to be exact their punishment for overusing a god-given power." As Odium one of the 4 Celestials of The World answers him

"What was to be expected? The power given to us.. we thought of it as a blessing, not a ticking time bomb, we-" as soon as these words were uttered, Arthur was sent to the realm of the dead,

"Snivelling creatures, your mere presence disgust me, the banishment is the result of your arrogance."

Arthur, not knowing what he should do, tries to find a saviour that may possibly rescue him from the depths. But there was no one, nothing but empty void of nothingness, all life was harnessed and no form of life was go be seen here. Unknowingly, Arthur's body gave up, but his mind did not. He swore to himself that he would crawl up from the depths and kill Odium. That was when he awakened his own Oath, The Mundivagant's Apotheosis.

"This, I see, once again I am gonna be used as a mere pawn in a celestials game. Even my death wasn't able to suffice, I am sorry, but all that ends here." As he utters these words, he was able to gain an oath and escape the depths.