The End Comes Before the Gods

Year 235 of the new century. With the rapid development of science and technology, mankind has ushered in a new era. An oracle broke this tranquility just as everyone was expecting blessings from the gods. Little did he know that the end was coming quietly. Animals mutated, society began to become chaotic, and civilization regressed. There are strange beasts running rampant outside, and strange people lurking inside. How should the protagonist use incomplete powers to persist until the arrival of the gods?