Too lazy to do a painting today.
"But what makes it evil?"
In-universe excuse again.
Pretty much this alternate universe is flooded with superheroes, but they all have destroyed the surface with their warfare, so what's left of humanity lives underground. Huh: that's an anime plot, isn't it? Drill to the heavens or something?
Anyway, some of the superheroes create massive skyscrapers across the Rewian Continent so as to not destroy the mantle of the planet, so that explains why they're on a building.
And something-something-main antagonists are the initial superheroes-something-something-lawful evil.