Yes, this is an open world where anything is possible.
"Actually, there's a special mode," a sharp voice emerged from the group of monsters, belonging to a witch.
The witch looked similar to the villagers, wearing a long robe of purple with green accents, topped with a pointed black hat adorned with a green decoration.
"When the God of Fiction created these illusory worlds, he considered that deity-like players might perform some marvelous operations, so he set up a special mode."
The witch moved to the front of the monster group and addressed the Structure God standing on a block of dirt,
"After activating the special mode, all life in the entire world will begin to spawn randomly, meaning that unknown new monsters and races will appear. It might sound like adding a mod, but it's actually a vast and rapid evolution of the world!"
"I hear even a Demon Lord could appear."