The night land. The protagonist has some psychic powers that makes him communicate with a girl on the other side of the Planet. Earth is dying and everyone lives on a gigantic ultra futuristic pyramid while the sun is death and everything outside the pyramid is heavily mutated or is related to some Lovecraftian horror eldritch. The dude has a military armor and a gigantic mecanic saw as a weapon and he has to travel to save the girl back to the pyramid. Pretty wild and cool

You are on the Steven Universe subreddit, ergo I’m not gonna read how you felt personally offended by a saga made for children