After all, he wouldn't be encountering the mythical Willow Minister, so Zachary was still very confident in his own strength.
In fact, Zachary felt that most of the mutated creatures found in dangerous regions were ancient creatures that had entered Blue Star through spatial portals during catastrophes.
Because there were strength limitations on the creatures entering Blue Star through the spatial portals, even though their strength was formidable upon entry, they were not insurmountable by the humans living on Blue Star. With Blue Star's existing capabilities, they could be completely wiped out.
The only exception was Rabbit's Home Zoo; the weapons in the security rooms of the other zoos were accidentally damaged due to the catastrophe, allowing those invading creatures to survive.