An old man

"This place still has an energy?" Xiu'er was skeptical. Looking at how desolate this place was, he couldn't think where was the energy here in this place.

"The energy is minuscule, so it's expected that you couldn't sense it." Jin Rou shook his head, "Besides, there is a terrifying thing here that might be the cause of the sudden drain of this falls."

"..." This time, Xiu'er believed what Jin Rou said. He couldn't help but feel a creeping feeling crawling under his skin. However, he still asked, "What is that terrifying thing?"

"An existence, to be exact." Jin Rou said gravely, "Until now, it's sucking away this falls' energy, turning it into its food."

"…" Xiu'er unconsciously step backwards. Jin Rou had successfully scared him. Jin Rou was very strong, and to categorize an existence as terrifying meant that the hidden monster here was a threat.

And now, even after thousands of years, it was still alive and still eating the falls' nutrients.