human
Subaru:  It had four legs with sturdy hooves for feet—and a thick torso supported by those legs. It had a long tail extending from its rear, and at least to that extent it resembled a horse. But where a horse’s head would be, it had what looked like the upper body of a human. But there was no head on that body. Instead, there was a twisted, giant horn growing out of the humanoid shoulders. From what Subaru knew, it sort of resembled the mythical half-human, half-horse centaur, but it was a twisted imitation, like whoever had been creating it gave up halfway through. It was twice as tall as an oiran bear, over five yards of grotesque monster. Subaru couldn’t speak as he looked at the profane creature that seemed almost like it had been modeled out of clay by a child.
gpt
Centaur:  “Giiiiiii!” The centaur let out an earsplitting screech and crushed the oiran bear’s ashes beneath its hoof. The being didn’t have a head. Its cry was coming from its upper body—the part that looked like a human torso. There was a vertical slit from what would be a person’s chest to the stomach, forming a mouth with sharp fangs on either side. In addition to its grotesque figure, the centaur’s upper body had a brilliant red mane of flames at its back. It burned the sands of the cavern at an unbelievable strength, making its surroundings glow red.
human
Subaru:  “Eep.” As the illumination of it filled the space, Subaru squawked in shock. He had already realized that the burning smell was the stench of demon beasts being incinerated. But the space he was in served more purpose than that. All around him were far more ashy corpses than he could have imagined, scattered wildly everywhere he looked. The word crematorium flashed in Subaru’s head. A demon beast crematorium. In other words, it was a trap, too— Sand time and the garden of demon beasts, the miasma path, and now this. They’re all grisly traps in order to keep people from reaching the watchtower.