"Okay, now that you're done learning the basics. Let's see how your ability works first." Fein smiled.

"Okay."

Fey woke up from her stupor and opened her mouth to say. "My ability let me pass through objects or even living beings."

'Ding!'

System: The use of ability was detected nearby the host.

[Phasing- The user's body would vibrate to a frequency that let her pass through anything.]

'Hmmm... Interesting, this works a bit like the one in the Flash.' Fein heard the familiar beeping in his ears.

She quickly walked to a tree nearby them, her whole body turned fuzzy just like a malfunctioning television. Then, she stretched her hand closer to the tree, but when her hand made a contact with the wood, her hand just passed through it, Fey further walked for about to step, and just like that, she came out of the back of the tree.

Fein subconsciously lay his chin on his hand as he contemplated and analyzed the pros and cons of Fey's ability. As someone from the century of films, he has a lot of knowledge about this. After all, his era is the era of superhero movies when DC and Marvel became a hit.

'Is her ability like the one in X-men or different? Hmmm... Let's use that method.'Fein focused his attention on her sister.

,m "What would happen if you cancel your ability while one of your body parts is inside an object? Have you tried that yet?" He asked.Fey shook her head, "No, I didn't."

"Then try it, it would determine what type of phasing ability you have." Fein leaned on the tree with his shoulder.

"But that's too scary... What if my arms were stuck on the tree? or my it split after canceling my ability?" Fey began to imagine horrifying things inside her head.

Fein nodded, it was normal to be scared by something like this, moreover, her sister was literally a civilian just the last few months and she only recently became a degu user. He didn't expect her to adjust that quickly. Her being mature in mentality is already a blessing. But maturity doesn't mean fearless, those two are two different things altogether.

"Don't panic, it's organic." Fein heaved a sigh. "Just try it, your brother is here to help when something goes wrong."

Fey felt warm in her heart seeing her reliable brother. Her eyes brightened as if she had drunk a bottle of chicken blood.

With a newfound determination. Fey used her ability, her body began to vibrate rapidly until her entire body became blurry. She raised her left arm and pushed into the tree in front of her again. When her arm passed through the body of the tree, Fey closed her eyes.

'It's now or never!'She then canceled her ability.

Fein on the other hand had already entered his 'Chess Perception' so he can respond when something goes wrong.Fey felt a strong repulsive force act on her hands, but she also felt a worm inside the tree and she could take it as long as she was fast enough, but obviously, she wasn't. So, her entire arm was repulsed, and her arms swayed out of the tree at an exaggerated speed.

Fein emerged at the back of Fey and held her tightly as support. Fey only felt an unmovable pair of hands on her back preventing her from moving.

'This phasing ability is kind of strange. It's a bit similar to Mirio but entirely different at the same time. What the fuck is going on!?' Fein was confused. 'does her power conform with the laws of this world, that's why it was different?'

After all, different worlds should have different laws. If so, then that's reasonable.

"How do you feel?" Fein asked but he knew she was fine.

"I just felt a little dizzy..." Fey massaged her temples. "Also, when I canceled my ability, I felt that I could touch the internal structure of the trees and bring it out with me, but a strong repulsive force was preventing me from doing it.", Fey explained.

Fein nodded, and he squinted his eyes. "I might know how your ability works. First, you can pass through anything, what I mean by that is, literally anything! your ability lets you vibrate into a higher frequency in which your body became intangible which would let you pass through tangible matters. Second, you can access the insides of anything and even humans, which means, you can squeeze the heart of people or even take it out from their bodies, but this is where the so-called repulsive force comes from. I speculate that the stronger the entity or the object from you, the stronger the repulsive force would be. And lastly, the repulsive force isn't purely bad, in fact, that's a literal cheat! if you master this ability, you can use it to your advantage! And it would let you have exaggerated mobility."

Fein inhaled deeply after he explain his theory of her ability in one breath.

Fey's eyes widened, she thought that her ability just let her pass through things, but she didn't expect that there was more than meets the eye!

"Then how could I make the repulsive force work to my advantage?" She asked eagerly.

You can adjust the direction you are facing or the pose you are holding, you will get repelled in that direction, which will give you immense speed and power. You can do that consecutive phase and repel out of anything so you can move around the battlefield." Fein grinned, he was happy for her sister's ability.

Fey tried her best to calm herself down. She clenched her fist tightly and put it in her chest to feel her pounding heart.

'With this, I can finally protect my mother, and carry some of my brother's burden in the future!'

For Fey, her brother is like a troubled hero who decided to keep all things from himself in order to protect his family in the shadows. That's why she understands why he doesn't want to let them know that he has power. She understands it because she became one, and she would do the same thing if her brother didn't reveal his power to her.