Martin paid no attention to the pterosaur beside him. Seeing its expression, he felt smug and walked away. The maid saw him and hurried after him. The pterosaur continued to scream, its voice echoing in the air.

Eric returned around noon. As soon as he saw Martin, he hurried forward to report, "Master Martin, that basin gives me the creeps, and I can't quite explain why.

This morning, I only explored a small part of it, and the creatures inside are extremely aggressive towards outsiders.

But strangely, some of the creatures were exactly the same as those outside, and I didn't know what was going on. When I was about to return, I caught an E-level monster and threw it into the basin to observe it for half an hour. I found that it gradually became manic and restless.

I suspect this place is like a Colosseum, and any monster that enters will slowly fall into a frenzy. But the Storm Winged Dragon is unaffected, which is really inexplicable."

After hearing this, Martin thought for a moment and then ordered Eric to capture a D-level monster. After the monster was controlled, Martin asked the little maid to go forward and try to communicate with it.

The maid took a deep breath and, using her knight's power, attempted to communicate with the beast. However, no matter how hard she tried, the beast remained unresponsive. The maid could only sense the bloodthirsty and violent aura that washed over her.

After that, after several more tests, the results were the same: these monsters were full of belligerence and savagery.

Martin brought Eric, William, and the others to the Storm Pterosaur and asked the maid to ask why it was not affected by the basin. After the maid did so, the pterosaur fell silent.

Seeing this, Martin had someone bring in a pile of meat and then told the maid to tell the pterosaur that if he told her the reason, he would have all the meat. The pterosaur barked excitedly twice, and the maid translated, "He said he would not tell us until we untied him first."

Martin looked at Eric, who nodded slightly. Martin then asked William to untie the ropes. Unexpectedly, as soon as the ropes were undone, the Storm Pterosaur dove directly into the pile of meat and happily began to eat. Martin didn't rush it, but waited quietly for it to finish eating.

After the Storm Pterosaur had eaten and drunk its fill, Martin asked the maid to repeat the question. The pterosaur barked several times in succession, then ignored everyone.

The little maid quickly translated, "It said it didn't know either, but it knew that as long as it stayed on Langfeng Mountain and drank the water from the spring on the top of Langfeng Mountain, it wouldn't go crazy."

After hearing this, Martin was certain something was fishy about Langfeng Mountain. Considering the prospector's previous suggestion of a vast amount of magic crystal ore, this was a serious problem.

After all, if this place really was like a Colosseum, common sense wouldn't allow for so much magic crystal ore. He speculated that this was most likely the centerpiece of the magic circle. After all, operating such a massive magic circle required a massive amount of magic power.

But who had set up such a massive formation? And what was their purpose? Was it to trap the monsters within?

Thinking of this, Martin immediately asked Eric to take the D-level monster to try to see if he could leave the basin and what would happen after he got out. He also specifically told him to bring a video capture device to record the situation at any time.

After receiving the order, Eric immediately led the monster out of the basin. Three hours later, Eric returned, but his face was very grim.

As he handed the Shadow Catcher to Martin, he said, "Master, when that D-rank monster first left the basin, it looked normal. But the further we got out, the less energetic it became. In the end, it just fell asleep and couldn't be woken up no matter how hard we called. An hour later, it died without any warning."

After hearing this, Martin turned on the video camera and found that it was exactly as Eric described. The monsters became listless after leaving the basin.

Martin then asked Eric to take a surveyor out of the basin and ask them to come back the next day.

Martin had been busy for most of the day and had no time to eat lunch, so he had to eat dinner directly.

But no one was in the mood to eat. They just ate a few bites and prepared to go back to rest.

However, no one slept well that night, tossing and turning and unable to fall asleep.

After finally making it to the next day, Martin immediately contacted Eric through the communication crystal.

Eric's voice came from the other end of the communication crystal: "Master, the explorer is fine. It seems that this magic circle has no effect on humans, only on animals."

After hanging up the phone, Martin told everyone the news. Everyone breathed a sigh of relief and ate significantly more than usual in the morning.

Looking at the Storm Pterosaur again, it hadn't left yet and was sleeping soundly on the remaining meat. However, four-fifths of the meat was gone, and its appetite was truly astonishing.

Martin planned to wait until it woke up and then have a good talk with it to see if he could think of a solution with the magic crystal mine and the spring water on the top of the mountain.

The Storm Pterosaur woke up from a nap, his head still fuzzy, when he saw the remaining meat beside him. He instantly became alert and stretched his neck to prepare to feast on it.

At this time, Martin came walking over with Eric and the little maid. Martin looked at the pterosaur eating voraciously and inexplicably felt a little hungry himself.

When the pterosaurs had almost finished eating, Martin quickly signaled the little maid to come forward and translate, saying that he wanted to take their entire tribe away and promised to provide them with endless meat.

After hearing this, the pterosaur just called out twice, flapped its wings, and was about to fly away. Eric looked at Martin, who shook his head and didn't let Eric take action.

The little maid quickly translated: "It said it wanted to go back and report to the leader to see if the leader agrees." As soon as the words fell, the pterosaur disappeared into the sky.

Martin decided to stay in the camp and arranged for William and Eric to explore the surrounding area in different directions. Time passed quietly and it was afternoon in a blink of an eye.

William and Eric hadn't returned yet, but the same Storm Pterosaur reappeared. It circled in the air, screamed a few times at the top of its lungs, and then flew away without even touching the ground.

The little maid translated hurriedly: "Stinky reptile, the leader will be here at this time tomorrow, so prepare the meat." Martin was angry and amused after hearing this. This pterosaur really only remembered to eat but not to be beaten.

As night fell, Eric and William hurried back to the camp. Eric looked exhausted, but also excited.

As soon as he saw Martin, he couldn't wait to say, "Master, this is a real hammer. This place is definitely an arena. William and I happened to meet on the way back and exchanged our respective exploration results.

It turns out that this huge basin has only one entrance and one exit. The most peculiar thing is that humans can enter and exit here freely, but animals are completely different.

As long as animals approach, they will be drawn into the basin. Any magical beasts in the surrounding area will flock in. Once these magical beasts enter, they are trapped, and it is impossible to escape. If they force their way out, they will probably end up like the previous magical beast.

After a brief pause, Eric took a sip of water and continued, "In addition, we've discovered that there are mountains similar to the ones we passed before in the east, west, south, and north directions of the basin. It's not clear yet whether there are mineral veins in the mountains, but what is certain is that each mountain is home to a group of magical beasts."