Bubbles continued to bubble out of this rift, and Mo Fei felt the strange energy coming out from inside, although it was very rare, rare to the point that it was a little imperceptible, but with special attention, Mo Fei still felt it.

"It seems that the energy that erupted at the moment of the previous earthquake was the most, and there shouldn't be much of this strange energy in it, let's see if there is the origin of this energy in it." After Mo Fei finished speaking to Katie, he harnessed the Blue Dragon Immortal Sword and rushed in the direction of the rift.

Coo-goo-goo!! Inside the rift, a large number of bubbles rushed out, and Mo Fei, who had just reached the location of the rift, immediately retreated with Katie.

"They're coming out." Murphy said to Katie.

Mo Fei had already guessed that the ancient piranhas would not give up on the old nest here, and he found it not only to study the strange energy emitted here, but also to kill them.

Whew!! In the water, the ancient piranha let out a ferocious roar, although it was known that the ancient piranha could not make a sound, but driven by the sound of the water, this sound attracted both Mo Fei and Katie.

"This fish is all fine, but even so, you all have only one way to die!" A cold glint flashed in Mo Fei's eyes, and countless sword qi on his body were faintly ready to be released, revolving around Mo Fei under Mo Fei's thoughts.

Coo-goo-goo!! The ancient piranha felt the killing intent that erupted from Mo Fei's body, but it was not frightened away, but rushed towards Mo Fei frantically.

"Sword Qi Strangulation!" Mo Fei let out a low snort, and the swirling sword qi around him burst out, and one after another sword qi rushed into the formation of the ancient piranha, as if the two armies were facing each other, and they frantically collided under the water.

Bang bang bang!! How could the body of the ancient piranha be able to block the sword qi attack sent out by Mo Fei, this is the sword qi derived from the soul of the sword immortal, and the sharpness can be completely able to directly penetrate them and penetrate the tofu.

Burst!! On the surface of the lake, an ancient piranha floated up, and its head and body had been pierced by a large hole, and it was too dead to die.

And after the first ancient piranha corpse floated up, a large number of ancient piranha corpses floated up one after another, each of which was pierced through the head and died, without exception.

Mo Fei took Katie all the way in, killing all the ancient piranhas, and the blood that continued to appear in the lake was also washed away under the turmoil of the lake, and Mo Fei and the two rushed into the rift, and entered the water cave along the rift.

As soon as Murphy and Katie appeared in the underwater cave, Murphy retreated with Katie in an instant.

Boom!!! With a muffled sound, where Mo Fei and Katie had just appeared, a huge ancient piranha bit into the air, biting the water into turmoil.

"Such a big ancient piranha, how could this be so big? It's all compared to a car. Katie said with a look of surprise in her eyes.

"It seems that these are adult ancient piranhas, but they are too big to turn this rift." Mo Fei said as he looked at the large number of ancient piranhas roaming outside.

"Mo, what are we going to do? These ancient piranhas are so big, and they're still in the water, can we beat them? Katie asked, looking up at Murphy.

"What's wrong with being big? Big is powerful? Murphy smiled at Katie.

"Kill them all, if you let them get out of here, it will be even more terrifying than those little ancient piranhas." Katie said as she tugged at Murphy's arm.

"Okay, I'll get rid of them now!" Murphy said to Katie.

Mo Fei also wanted to solve them, and if he didn't get rid of these adult ancient piranhas, they wouldn't let themselves go in at all.

The ancient piranha was not afraid of the oppression of the sword intent issued by itself at all, although it was brave and ferocious, its strength was still too weak.

The sword qi on Mo Fei's body erupted again, rushing towards this group of adult ancient piranhas.

The explosion of countless sword qi couldn't even stop the adult ancient piranha, it was just that it was attacked a few more times than the little ancient piranha, and it was also killed on the spot in an instant, with no chance of survival.

And the death of so many giant ancient piranhas has aroused the murderous nature of other ancient piranhas, and when they encounter blood, they will devour them madly whether they are of the same kind or alien.

"These piranhas are so inhuman." Katie said with some disgust as she watched the piranha devour her dead companions.

"I now understand why they are able to survive in this water cavern, not to mention the air here, their food problem should be on their kind." Murphy said to Katie.

"They kill each other to survive? But why haven't they been eaten up and become extinct? Katie asked.

"It is estimated that the ancient piranhas have a fast growth rate and a large number of reproduction, otherwise it is not enough to maintain the food of a race, but they are also limited to a certain number because of this, but this number of individuals will become stronger and stronger." Mo Fei analyzed.

In the middle of the conversation between the two, Mo Fei had already slaughtered many piranhas, and there was no trace of other large piranhas in the place where the rift exited, some were a pile of flesh and blood.

"Let's go." Mo Fei said to Katie, and at the same time he harnessed the Blue Dragon Immortal Sword and rushed into the inside of the cave.

Mo Fei's speed was very slow, and he didn't rush directly into the cave, but tentatively observed his surroundings to see if there were any other fish that had slipped through the net.

After finding no target, Murphy and Katie finally begin to explore the secrets of the cave.

Mo Fei followed his feelings towards the depths of the cave, where it was difficult to see anything in the dark area, and Katie could no longer see anything, only relying on Mo Fei's words to point.

Under Mo Fei's perception, Mo Fei quickly found the origin of the strange energy exuding from this cave, which was a black stone, which could not be seen in the darkness of this cave at all, and could only be discovered by relying on spiritual perception.

And this black stone emits this strange energy from time to time, so that Mo Fei finally determined that it is the origin object of the strange energy.

Mo Fei stretched out his hand to grasp the stone, when suddenly a cold shot straight from one side, and Mo Fei quickly retreated with Katie.

"And? Well? Why is this head so big? Mo Fei only then discovered an ancient piranha hidden in the corner, this ancient piranha was the size of a large truck, and it was larger than the previous adult ancient piranha.

And this ancient piranha king is not just big, it is already considered to be cultivated, and after having a certain amount of wisdom, it feels the strength of Mo Fei, and does not dare to appear easily, and only makes a move on Mo Fei when he wants to take the evolution stone.

As soon as the Ancient Piranha King made a move, it was an ice arrow, capable of sending out energy attacks, so that Mo Fei had to sigh at the magic of this stone.

The Ancient Piranha King stood in front of the Evolution Stone, looking at Mo Fei staring at him, it didn't dare to make a move easily, it knew that Mo Fei's invisible sword qi was powerful, and it was able to kill all its people, killing it to the point where it was left with a light commander, which made the Ancient Piranha King not afraid.

"Mo, I feel the energy emitted by that stone so comfortably, it seems to be able to promote the strengthening of my abilities." Katie said suddenly to Mo Fei.

"Oh? Can you boost your abilities? Aren't mutants' abilities acquired by the X gene? In this way, this stone can promote the evolution of any living being, and if it falls into the hands of mutants, doesn't it mean that it can make mutants stronger and stronger? Mo Fei asked, his eyes widening when he heard Katie's words.

"Well, Mo helped me get the handle, I also want to be stronger, and then I can help you fight." Katie hugged Mo Fei's shoulders and said coquettishly.

"Okay." Mo Fei looked at Katie's coquettishness, and immediately agreed, which can make Katie's strength stronger, and Mo Fei can't ask for it.

"Sick !!" With a stroke of Mo Fei's sword, his feet floated, and the Green Dragon Immortal Sword instantly flew up and revolved around Mo Fei.

"It's good that you can cultivate into refinement, but since you're in front of me, you can only say I'm sorry." Mo Fei's sword pointed at a point, and the Green Dragon Immortal Sword followed Mo Fei's sword finger and instantly shot towards the Ancient Piranha King.

The Ancient Piranha King felt that he was locked, but he didn't even have a chance to resist, the Green Dragon Immortal Sword pierced through its body, and the wide-eyed Ancient Piranha King fell down without a blink, and then floated up under the buoyancy of the water and hit the top of the cave.

"Wow, Mo, you are so powerful, such a big ancient piranha king was killed by you with one move." Looking at Mo Fei's Green Dragon Immortal Sword, Katie said with a little star adoration in her eyes.

Mo Fei's vanity increased in an instant, and under the praise of his girlfriend, even Mo Fei couldn't help but shudder.

"That's, don't look at whose boyfriend I'm with." Mo Fei's appearance caused Katie to cover her mouth and chuckle, which made Mo Fei even more embarrassed.

After a little fighting, Mo Fei cut the Evolution Stone out of the rock wall with his sword qi, and after cleaning the rock dust on it in his hand, he prepared to hand it over to Katie to take with him.

"Ink, help me carve it. This stone of evolution is too ugly. Under the slight sword light emitted by Mo Fei's Green Dragon Immortal Sword, Katie saw the appearance of the Evolution Stone and said to Mo Fei.

Mo Fei knew that girls like beautiful things, so after hearing Katie's words, Mo Fei nodded slightly, and the sword qi flashed quickly in his hand, and it didn't take long for a beautiful statue of Katie to appear vividly in Mo Fei's hand.

"Wow, Mo, that's beautiful." Katie reached out and grabbed it, played with it in the palm of her hand, and said coquettishly to Mo Fei.