Han Sen believed there to be many super creatures residing in that underground realm, and he believed he'd have an easy time venturing in to slay them whenever he desired. It'd be an efficient way for him to become stronger.
But Han Sen, after returning there, was unable to find one after a few days of subterranean travel.
There were no average-but-strong creatures, either. There were only ordinary rock rats, toads, and crickets to be found.
"This can't be right. Why aren't there any decent creatures for me to slay?" Han Sen frowned.
Queen observed the surroundings and said, "These creatures are smarter than we gave them credit. They are watching us, observing our every move."
But down there, they had no other efficient way to track the creatures they sought. They couldn't avoid being watched, as the rats were everywhere.
The super creatures had placed Han Sen on their blacklist, so they avoided him at all costs.