Death Emperor Star in itself held a desolate atmosphere. The sky was black, the soil was black, the fog permeating the air was black; as a result of the copious amounts of death mana in this world's foundation, the entirety of its figure had been painted in its color.
When Damien teleported to Hidden Death Valley, he didn't take much time to observe the surroundings for this reason. The black plains he landed in were a dreary and repetitive atmosphere without much variation.
That didn't mean that the rest of Death Emperor Star was the same, though. The surrounding 50,000 kilometers or so were regularly maintained by Hidden Death Valley's staff and geniuses, allowing it to remain free of the rest of the world's danger.
Unlike Death Emperor Star's regular scenery, however, Hidden Death Valley was completely different. As a premier academy for the universe's peak geniuses, it naturally had to be up to par.