Comprehensive Comic Answer Questions: Project the Screen to the Heavens and Play with Dimensional Transformations

A giant screen stretched across the sky, forcing the screen to project the craziest "dimensional transformations". When Kallen Kaslana's OOO team sang on the screen, and when a mysterious being took out the "Hatsune Miku" Gaia memory and punched a hundred tons, the entire chat room exploded. Honkai Impact, Fate, Demonic Forbidden... Countless strong men who were pulled into the question-answering space stared dumbfounded at the absurd showdown on the screen - Dragon Knight defeated "Hatsune", Amiya transformed into Ultraman, and Irena held a katana to split the "Blood Meridian". Please answer: Which system does this transformation come from? Correct answers will grant you power, and incorrect answers will be instantly erased. While all the worlds are still frantically searching for what "Kamen Rider" is, only Fumino Kido in the corner has cold fingertips - how come this chaotic style of painting all comes from the fanfiction book she made back then? This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.