Transformed into Hyper Zetton, the school beauty was terrified in the second playthrough.

"Black Mist Amber?!"

Lin Chengfeng then remembered that he still carried with him a living alien core that was suspected to have been left by his grandfather.

Since learning about the transformation techniques of the Monarch Organization, he has believed that Black Mist Amber is one of them.

I haven't tried it yet.

Since I already have Hyper Zetton, why would I need to fuse with a living heteronucleus with unknown risks?

More than that, Lin Chengfeng was concerned about why his sister's body had a living heteronucleus.

What exactly happened during the time she was missing?

"Xingtong, you really don't remember what happened just now?" Lin Chengfeng asked again.

Lin Xingtong shook her head: "I think I fell asleep right after I finished cleaning, and when I woke up I saw you next to me."

Lin Chengfeng pursed his lips, torn between whether or not to follow the system's instructions.

If she doesn't listen and lets the living foreign nucleus remain in her body, what will happen?

After much deliberation, Lin Chengfeng exhaled a deep breath.

"Transforming into a monster has its advantages and disadvantages. While it provides the power to protect oneself, it also carries the risk of being hunted down by humans. Once her identity is exposed, Xing Tong will have nowhere to hide in the base city," Lin Chengfeng thought to himself.

He put his hand in his pocket, took out a small box and placed it on the bedside table, then turned around to pour himself a glass of water.

"Brother, what are you doing?"

"You just fainted and you're still very weak. Take your medicine. It might be a bit strong, so tell me immediately if you feel any discomfort." Lin Chengfeng held a water glass in his right hand and took out the black mist amber from a small box with his left.

Because the room lights were off, Lin Xingtong couldn't make out the shape of the black mist amber.

Otherwise, if she sees a moving black mist inside the amber, she will never swallow it.

She didn't doubt Lin Xingtong's words and readily opened her mouth wide in agreement.

"No need to chew, just swallow it."

"Um."

Lin Chengfeng first gave her a sip of water to moisten her throat, then picked up the black mist amber and put it into her mouth.

Gollum~

With a gurgling sound, Lin Xingtong swallowed the black mist amber.

Then drink half a glass of water.

"How is it? How does it feel?"

"What kind of medicine works so quickly? Brother, you're worrying too much..."

Before she could finish speaking, Lin Xingtong frowned, feeling a surge of heat in her lower abdomen.

It was as if a bonfire had been lit inside.

"I can feel it! My stomach feels warm and comfortable..."

At the foot of the bed, the cat's eyes narrowed slightly.

He stared intently at Lin Xingtong's lower abdomen.

Heteronuclear fusion?

No! It's devouring!

What the hell was that alien core he fed the girl?!

The Cat Who Doesn't Smile has never heard of a heteronucleus being able to devour others; this is the first time it has ever seen such a thing.

It is uncertain what will happen next.

However, they became very interested.

If I could also devour the alien cores of other monsters, wouldn't the throne of the Monster King be within my grasp?!

The cat, who didn't smile, was lost in a beautiful fantasy, and now had another reason to stay.

Lin Chengfeng frowned slightly. He could clearly sense that the energy within his sister's body was rising at a rocket-like speed.

Logically speaking, this energy would have crushed a normal person long ago, but Lin Xingtong is completely unharmed and even more energetic.

Therefore, there is only one possibility.

"Xingtong, try to control the power within you and make it manifest on your body," Lin Chengfeng said earnestly.

"Alright, I'll give it a try..."

Under Lin Chengfeng's guidance, Lin Xingtong successfully connected with the power within her body in two minutes.

A purplish-black light burst forth from her lower abdomen.

In an instant, a long black wing sprouted from its back, easily piercing through the room wall as if tearing a tissue, and extending into the outside corridor.

puff!

"Huh?! What... what is this?!"

Lin Xingtong looked at the wing that had grown out of her back with a mixture of surprise and delight.

Lin Chengfeng tried to touch her wings, but as soon as his finger touched a black feather, her body, which possessed defenses comparable to those of a monster capable of breaking through a city, broke through.

puff!

A scar appeared on his finger.

He withdrew his finger in time, looked at the finger that had bled slightly, and a relieved smile appeared on his face: "Xingtong, congratulations, you have officially become a combatant."

"Huh? Me? A combatant?" Lin Xingtong pointed at herself in disbelief.

Her mind was blank; she turned into a combatant just by taking some medicine? That's too far-fetched!

More than ten years ago, it was clearly detected that it did not meet the criteria for a fusion heteronuclear body.

"I know you're confused, but it's true. The single black wing on your back is the manifestation of your alien core's power."

"Let's put the black wings back first; they're strangely sharp."

"How...how do I collect it?"

"Just disperse the released energy."

Lin Xingtong tried for half a minute and finally found the trick: dissipate the energy.

The black wings slowly disappeared.

Based solely on the strength of the Black Wings, Lin Chengfeng had no doubt that she could easily annihilate an ordinary B-level combatant.

Lin Chengfeng didn't know what level of power the Black Mist Core could reach if it were further trained and its other powers were unleashed.

Now there's an even bigger problem...

Does the Black Mist Core have the ability to transform into a monster?

If you could transform, which monster would you be?

"I can't believe I've become a combatant, am I dreaming?" Lin Xingtong reached out and pinched Lin Chengfeng's thigh.

Lin Chengfeng slapped her hand away quickly: "You're not dreaming now, but you'll be dreaming soon."

"It's already past 3 a.m., you should get some rest. I'll study your heteronuclear ability after my match tomorrow. Don't use it when I'm not around, and don't tell anyone else."

"Okay, goodnight, bro. I'm sorry you'll have to sleep on the sofa. My single bed can't fit two people." Lin Xingtong bent down and carried the cat, who doesn't smile, from the foot of the bed into the blankets.

"I'm used to it, don't worry about it." Lin Chengfeng shrugged indifferently, got up and covered her with the blanket, while Bu Xiaomao lay there helplessly under the covers.

Damn!

I was even thinking of going out to hunt down a B-rank combatant for a treat later.

Sigh, never mind, for the sake of the grand plan to extract the secret of devouring the alien nucleus in the future.

This sacrifice is worthwhile.

The cat that doesn't smile comforts itself.

Lin Chengfeng left the room, closed the door, and glanced at the wall with a cut in it.

She turned around and walked to the living room sofa to lie down.

Open the system interface.

The reward for completing the task has been credited to your account.

An additional skill set has been added to the section.

Upon clicking through, it appears that there is currently only one option: Greza.

Then click into Greza's skill set.

Currently, only three have been unlocked: Evil Sound, Vortex Beam, and Void Body with maxed-out evasion.

A large number of the remaining ones are locked and require Evolution Points to unlock.

Each one starts with 100 evolution points.

"Tsk, I thought I could get a set for free, but they only gave me three?"

"However... these three are quite strong too, which gives me a little more confidence when facing other top-tier dragons."

"After this tournament, I'll have to go to the surface to collect evolution points."

…………

P.S.: I've added an extra chapter. My heart is beating so fast, I feel like I'm about to die suddenly.