HymnOfRagnarok
Let's Rock
Cthulhu is the high priest of the Great Old Ones, leading them in worship of the Outer Gods. The King in Yellow and Nyarlathotep are common in that regard, but are beaten in sheer volume by Azathoth and Yog-Sothoth. There's a whole hierarchy:
This reminded me that Azathoth and Yog-Sothoth are pretty much reality itself.
Which in turn reminded me, "Huh, isn't that kinda sorta what Madokami becomes? She more or less reset the universe to break reality over her knee and make a happier ending..."
So on the power level thing, food for thought I suppose. As far as peers go, Madokami seems waaaaaaaaaaaay the fuck up there.
And would probably count as legitimately horrifying and truly evil, if you were going by ancient Greeks where Hope was considered the greatest of all evils. That's why it was the last thing in Pandora's box.
Also, don't suppose the Mom!Ruby omake will ever find its way to us?