Within the source world of the iconic "Witcher," anomalies such as the "Lord God's team" would show up. Clearly, this was the doing of writers. These authors might not hail from Zhao Youyue's reality, but some other source world where endless survival type dimension-traveling, Doujinshi works were viral. Perhaps that world was derived from an iconic cultural entertainment franchise?
In this source world, "Olivia" did not exist. Everything followed the original Witcher 3 game. A famous author of the endless survival type dimensional-traveling novel, similar to an extremely popular writer like Master Juan Tu, had written about how his protagonist had entered "The Witcher's" game world...
This led to several other writers following in his footsteps. They all used "The Witcher" as the background setting, producing Doujinshi works based on the endless survival type dimension-traveling genre.