Crossing into Great Qin to Become a Tyrant

Chen Chujian transmigrates to Great Qin and becomes the emperor, wielding power over all under heaven and enjoying a harem of palace beauties.

He fuses with one hundred billion dragon souls and gains a Dragon Soul Unlock System.

“Ding! You unlocked one dragon soul. You obtain one chance to raise three levels in a row!”

“Ding! You unlocked ten dragon souls. You obtain one life-saving golden pill refined by Taishang Laojun!”

“Ding! You unlocked ten thousand dragon souls. You obtain one trial card for Sun Wukong, the Great Sage Equal to Heaven!”

“Ding! You unlocked one hundred thousand dragon souls. You obtain one Daji!”

The synopsis is weak, so please read the main text. It is extremely satisfying!