H2O and the question of the mirror sphinx

Beyond the seven underworld realms, the Vulpes villainarium awaits... A longed-for visit to the summer festival Kost-Live-Con, for which a group of friends from the H2O clan have dressed up, results in an unexpected tragedy. Hugo, Ophelia and Hubert, dressed as their favourite mega-heroes, helplessly witness the kidnapping of their friend from the future, Slzynoci, who has been captured by an animated three-metre tall monstrosity that dangerously resembles their arch-enemy, the mad scientist Hermenegild Vulpes. But did they eradicate from the world the famous archduke, whose diabolical plans had already been thwarted five times? It turns out, however, that Professor Vulpes has managed to back up his perverted consciousness before and survives on in the form of ones and zeros. The Internet, however, is just another name for the underworld, which a group of teenage daredevils set out to save the Slzunoci without a second thought. But can they, if they succeed at all, make it back from the depths of cyberspace? The sixth adventure will take the young heroes beyond the borders of our world, to the dark realm called e-Rebus, from where they say there is no return. But you don't know the H2O smokers! "There are so many ideas in the book, I didn't even have time to copy them!" - Artificial Intelligence "Listen, Clanaraders, doesn't that monstrobot remind you of anyone you know?" Ophelia asked worriedly. "Sure!" Hugo smacked his forehead. "After all, he is the arch-villain Hermenegild Vulpes. The mad scientist we've stopped five times from taking over the world." "It can't be Vulpes," Hubert contradicted him. "This one is much bigger, edgier, and besides - we have erased Professor Vulpes from the world. On our timewarp trip to the past, we talked Vulpes' parents into never having him. So he was never born." Tears wanted to object, but at that moment the three-meter monstrosity came to life, just as the poster promised. - excerpt from the book