Become a Respectable Person by Absorbing Heterogeneity

250 Years ago, disaster broke out. Blue Star suffered from heterogeneous erosion from the outside world, and the environment suffered from heterogeneous pollution, which indirectly caused more than 70% of the world's population to be poisoned and exploded to death. Most people were forced to stay in giant oxygen tanks to survive, while a very small number of people boarded spaceships to evacuate Blue Star. The authorities in various places are in chaos, violent conflicts continue, and doomsday theories have resurfaced. 200 Years ago, the 57-Hr antigen drug was born, the four major alliances were established, and human civilization moved from chaos to order and was able to breathe. Among them, four strange events emerged, which are still unknown. Weird One: Inexplicable high-civilization ruins appear all over the world. Human beings who entered the exploration acquired the method of absorbing foreign cultivation methods, miraculously survived, and gained unprecedented mysterious power. The powerful ones could even lift mountains and fill seas, just like ancient gods. These people were later called alien warriors. Weirdness 2: One year after the disaster broke out, a small number of humans tried to fly out of the Blue Star in a spaceship again, but were blocked by an invisible barrier fifty thousand meters above the ground, which could not be broken through various methods. Weird 3: Three years after the disaster broke out, a giant palace projection stretching for thousands of kilometers appeared in the sky at an altitude of tens of thousands of meters. It was suspected to be a mirage, but the source of the projection could never be found. Weird Four: Forty years after the disaster broke out, broken space debris appeared in various places, from which monster beasts and otherworldly civilizations that were not afraid of thermal weapons were born. They were murderous towards Blue Star humans and occupied large areas of land. The war continues into modern times...