The Protagonists' Chat Group: Beyond the Boundaries Novel

I'll rewrite the novel description as a synopsis based solely on the information provided. Shi Jian finds himself transported to the Perfect World as the cousin of Emperor Huang Tian. Faced with the looming threat of dark turmoil—including dangers like the World-Destroying Elder and the Corpse Emperor—he's understandably concerned about survival. His fortune changes when he awakens the Library of the Heavens, a system granting him the ability to copy any martial art, physique, or magic weapon. While initially planning to create his own version of Emperor Huang Tian's power, Shi Jian receives an unexpected invitation to join a mysterious chat group. The group's members are all protagonists from different realms: Xiao Yan, Fang Han, Yang Qi, Li Qiye, Lin Dong, and Luo Feng, among others. This discovery brings Shi Jian considerable satisfaction. When dark forces from beyond the Sea of Boundaries eventually strike and Emperor Huang Tian prepares to face them alone, Shi Jian takes action. With a snap of his fingers, he summons countless protagonists across dimensional boundaries, and together they shake the very foundations of the Plateau itself.