He accidentally traveled to a world where thousands of races competed for hegemony, and became the lord of a human race that was about to become extinct. His extremely weak body became an existence that other races occasionally beat up as a sacrifice. At this time of life and death, the Digimon system that traveled to this world with him awakened.
Agumon-Greymon-MachineGreymon-BattleGreymon!
See how I can create a heavily armored synthetic brigade composed of humans and Digimon, overwhelming all races and looking down upon the world.