Rebirth into the primitive society, is it unexpected or surprised?

Karta was born again, but in his heart there were ten thousand horses galloping.

Giant insects of the Carboniferous era, dinosaurs of the Jurassic era, and fierce beasts of the Paleogene era, which primitive age is this time and space?

Are humans so weak? What about rebirth benefits?

No way,Karta could only bring primitive people and sound the war trumpet for the rise of the primitive world!

Primitive: Ooooooooo amazing, my brother!