The Greatest Undercover Agent in the Primordial World

(Note: This isn't a traditional prehistoric-world fanfic. It contains a lot of the author's own imagination, and well-known figures interact with the protagonist in the middle and later stages.)

“Some say my fate is to ‘win glory for one general at the cost of ten thousand bones’...”

Su Ze never imagined that after transmigrating to the prehistoric world, he'd have to go undercover!

You've got to be kidding. Backstabbers never get a good ending!

But if he didn't go undercover, he'd die!

With no other choice, Su Ze infiltrated the Wu and Yao clans, quietly growing stronger as he waited for a chance to turn things around.

Three years...

Then another three years...

Then another three years...

After countless stretches of three years, Su Ze was still undercover.

“Damn it! Fine, I won't turn things around. Can't I just be the number-one undercover agent in the prehistoric world?”