Demons Invade, and I Play Yang Jian from the Start

[High martial arts + System + wild imagination + male wish fulfillment + multiple identities + no female lead] While the whole school was gathered on the sports field, a huge rift suddenly opened in the sky. A colossal beast emerged, followed by countless alien races charging through. The aliens joined forces with the Demon Gods to seal off the entire area, cutting off all reinforcements. Humanity’s strongest fighters were defeated, and the lives of everyone in the city hung by a thread. You alone carry the legacy of the Holy Lord Erlang, Yang Jian. You charge against the crowd to face every enemy by yourself. Clad in dragon-patterned armor, wearing a Heaven-Rising Hat, with Cloud-Treading Boots on your feet, a Three-Pointed Double-Edged Spear in your hand, and a Demon-Slaying Sword at your waist. You soar to the highest point in the city, looking down over everything as you proclaim: “I carry on the true teachings of the Holy Lord and uphold the law. You demons and monsters have thrown the human world into chaos. You must die!” With one strike, you wipe out every enemy. Zheng Qingfeng transmigrates to a high-martial world where the legacy of mythology has been lost, but obtains the Mythology Revival System. From then on, he will take on the identities of gods and roam the sea of stars. Countless identities, countless gods. As Yang Jian, he slays demons and protects humanity. As the Demon Ancestor, Luo Hou, he massacres the countless races and sacrifices entire planets. As Sun Wukong, he fights his way into the Divine Court of the gods.