Undertale Undersprit

A long time ago, the earth was ruled equally by two races, humans and monsters. One day, the war drums shattered the peace between the two sides; under the almost massacre-like invasion of mankind, mankind won a complete victory. Humans expelled the monsters to the underground world, and seven warlocks set up a very powerful magic barrier to trap the monsters in the underground world. People can enter the lower world at Mount Ibot, but they need at least one human and one monster soul each to leave the lower world. Before the story begins, no human being has ever left the lower world alive, leading to rumors that there are climbers on Mount Ibot who never return. Monsters are trapped in the underworld, ruled by Asgore. After a monster dies, its body will immediately turn to ashes, leaving no soul or body behind. Moreover, monster souls are far less powerful than humans. When a monster obtains 7 human souls, it can open the barrier and become a god. At this time, the monsters can also regain their freedom and return to the ground.