Great Tang: I Slack Off with the Human Emperor Banner and Leave Li Er Stunned

Li Xian transmigrates from the cultivation world to the Tang Dynasty and becomes Li Shimin's obscure Sixth Prince.

The bad news: spiritual energy has dried up in the Tang Dynasty, so cultivation is impossible!

The good news: his life-bound magic treasure, the Banner of Ten Thousand Souls, came with him. By collecting the "resentment and outrage points" of famous figures in Tang history, he can exchange them for spiritual energy and modern technology.

From then on, the Tang Dynasty's style takes a sharp turn, gaining an infuriating playboy prince.

Wei Zheng: "Your Highness, Prince of Chu, how can you set up a grill in the Taiji Hall and roast meat? It's an affront to decorum!" [Wei Zheng's resentment +999]

Li Shimin points at the flag in Li Xian's hand, black smoke pouring from it, trembling with rage. "You rebellious son, what is that sinister thing in your hand?"

Li Xian shakes the black flag with righteous solemnity. Golden light shines brightly. "Father, bear witness! This is the Banner of the Human Emperor. Every soul inside is a Turkic hero fiercely loyal to our Tang Dynasty."

As the entire court falls into deathly silence, they watch Jieli Khan inside the Banner of the Human Emperor furiously pedaling an exercise bike to generate electricity.