Sever the underworld river

"Is there a way to deal with it?" the elder behind Alexander asked with a grave expression.

"All the existing technological weapons have been tested, and they can't pose any threat to the Underworld River, not even penetrate the white mist that envelops the entire Underworld River. If we don't find a way to harm it, we can only be at its mercy!"

"Fortunately, we've found something that can harm those black beetles!" Sofia, picking up a strangely shaped silver gun from a nearby shelf, said:

"The Underworld River needs pure mental energy, but living beings possess not only mental energy but also the emotions and thoughts that govern it. These things are like poison to the Underworld River, forbidden! This gun was made with the forbidden energy of tens of thousands of people and can fire ten shots."

As Sofia spoke, she aimed the gun at a distant wall and pulled the trigger.