Myth Analysis: I'm Invincible Because I Know the Plot

A millennium ago, an unprecedented cataclysm swept across the blue planet. During the disaster, strange fragments appeared on the earth, each containing a different world. These worlds varied greatly, some with martial arts cultivated through inner strength, others with cultivation through magical power, and some where immortals descended to destroy the world. People discovered they could enter these worlds, possessing the bodies of certain characters. Surviving until the end of a world would grant them its power. Li Su, inexplicably transported to this world, discovers that the fragments contain worlds from novels he's read in his past life. Thus begins his journey...