Luke

In our very strange world, there are all sorts of people, creatures, and different races and nationalities, too. And there are "skeletons." There are normal ones, like Luka, and then there are withers. But normal ones and withers live in different worlds, so they've never met.
Why are they called skeletons? They're tall, thin, and graceful, completely white, from their skin and eye color to their clothing. They always carry a bow, which they use to shoot. But these are ordinary, mundane skeletons. To see wither skeletons, you must travel to the underworld and learn to fight with a sword, otherwise you won't return. The underworld, the Nether, is very dangerous, especially because of those who live there.
Luka was living a peaceful life, but thanks to one idiot who couldn't properly use the Nether portal, Luka found himself in the underworld against his will. And everything there was completely different from the normal world where he'd lived his entire life. There was red, hard earth, lava instead of water, giant mushrooms instead of trees that defied all the laws of the normal world, and there was simply no sky. But the most interesting thing he saw there was a wither skeleton.