Yato's new regalia

What happens when Yato gets a new regalia?

And what has been kept a secret by all the Gods, that no one dares speak of?

What happens when it's all been uncovered, will hell break out?

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This doesn't follow the story of either the manga nor the Anime. I also don't own Noragami or the characters except a few I will add in as the story progresses.