King of Laughs

Transmigrating into the Da Cheng Dynasty's death row cell, Zhang Zixiu is about to be beheaded when he is forced to bind the "Invincible Humor System." He thought he'd talk his way to survival, but the system is just a stat panel in disguise! As long as he makes his enemies laugh until they break, he can endlessly stack strength and defense. "Listen, there once was a penguin..." When the executioner and the official overseer laugh until they roll on the ground, foaming at the mouth, Zhang Zixiu crushes his shackles bare-handed and brings down the execution ground with a single turtle-fist punch. The court officials think they've gotten a jester, until the day foreign armies press against the border. Zhang Zixiu stands on the city tower and tells a hellish joke; as the entire army laughs itself into spasms, he leaps from the tower and shatters the enemy commander's skull with one punch... Is this Da Cheng realm won by jokes, or by his fists? — Description from novelcodex.org