Simultaneously Time-traveling, My Cheat is the Plot Master Deng

Qi Ji, caught off guard, was transported to countless worlds by an exploding computer. There, he discovered characters from the stories appearing in his mind, even taking on the role of an old man. Within this space composed of countless icons, Qi Ji encountered his counterparts from other worlds. Most importantly, each of these versions of himself carried a constant old man in their minds. [Harry Potter]: (Qi Ji, the protagonist of Legacy of Hogwarts in his mind) Little Tom, your Unforgivable Curse isn't fast enough, nor is it ruthless enough. Come, let your old senior teach you how to use it. [Chinese Paladin]: (Qi Ji, with Fei Peng in his mind) Talk, talk, you all talk! Talk about the Demon Lord causing chaos, the Evil Sword Immortal causing suffering to all beings, and I will shoulder the burden of all life. [Fate]: (Qi Ji, receiving one-on-one guidance from Tokiomi Tohsaka) My classmates Rin Tohsaka and Sakura Matou always look at me strangely, and they're gradually becoming yandere. What should I do? I need help urgently! [Soul Town Street]: (Qi Ji, holding the Imperial Seal of the State, with Ying Zheng standing beside him) Where are the iron cavalry of my Great Qin? Let these youngsters witness the wisdom of our ancestors! [A Certain Terra]: Amiya is here? That's good. Wait, what does "War General Amiya" mean? What does "First Daughter Returns" mean? What does "The Moon Lord is coming" mean? Which Terra is this? In countless worlds, countless Qi Jis have led the old man in their minds forward, reaching the pinnacle! (This book includes, but is not limited to, Harry Potter, Lord of Mysteries, Soul Town Street, Sun and Moon in Misfortune, Shrouding the Heavens, Fate, Under One Person...)