Von resisted the urge to move throughout this process, afraid that he could interrupt something delicate. He finally breathed out in relief when the electricity shrieked until dissipating.

Von stared at his hand in awe before exhaling as he moved his gaze at the panel he had missed.

[ First battery core: 96% ]

Question immediately rose in Von's head upon reading the panel.

"System, please tell me what a core is and how much there is" Von could guess what the core meant but decided to ask anyway.

[ A core is used to store energy. There are currently one core present, host may upgrade this number with enough resources ]

Von began to think. This much usage was too little. When the system saved him, he remembered that it had consumed more than fifty percent of usage alone.

"When can I get a new core?"

[ Requirement: 100% First battery core ]

"Right.." Von shook his disappointment away and focused on what he got from his mission.

[ The following features may be unlocked: Spacial space, Hardware tree, Shared energy ]

[ Unlock now? ]

Von read through the panels and clicked 'yes' without hesitation.

Another panel followed. The format was a lot similar to window's command prompt as codes flashed through the screen faster than he could read. Luckily a hint was shown below.

[ Implementing features. Please wait.. ]

[ Warning! Host may be subjected to pain due to reconstruction of the system ]

Von had a bad premonition the instant he read the first words of the new panel.

Not two second after reading this, Von felt a sudden jolt in his head which quickly surged to the rest of his body.

He felt a painful sensation all over as electricity current flowed erratically inside his body. These experiences seemed to be related to the next panel as changes to his body was represented to a percentage by the system.

Von's eye couldn't help but twitch at the crawling progress

[ 1%...2%.....3% ]

It rose very slowly. However, Von could do nothing but frown in pain. He closed his eyes and took a deep breathe, he felt the sense of pain as a whole and... Looked at it blankly. There were no thoughts, only an indifferent yet serene stillness.

A few minutes passed in this state until the percentage had reached a hundred.

Von struggled to breath at the end of it, he felt completely tired as if the process had taken a large bite of his energy. Despite this, his sleepy eyes revealed a trace of joy.

He asked the system on how to proceed which gave a new panel

[ Simply say or think of 'menu' and a list of tabs will open ]

Von did as follow and got a list options

[ Menu: Spacial space, Hardware tree, Shared energy ]

Von's fingers hovered on the panel and immediately reviewed each section. At the end, he was more than happy at what he got.

Spatial space was as he expected. It gave him something akin to a pocket that can be used to store just about anything. What was nice about it besides being absolutely overpowed was that it preserved anything that was inside by halting time. Useful for survival.

The Hardware tree didn't lack in quality compared to the spacial space. It was a progressive upgrading tool that developed the system into specialities. For example, he could dedicate his time to upgrading his energy supplies and it would eventually branch of to energy efficiency, amount, and absorption rate. However this, didn't limit other options. It simply requires energy from the cores, given the sufficient amount, you can build just about every possible trees.

"So much potential.." Von's eyes sparkled as he gazed at the number of trees he could build.

However, that wasn't the only one with many possibilities.

Shared energy is exactly as it says, he could now manually use the stored energy from the cores as his own through the newly constructed circuit frame on his body. This allows him to manipulate the energy as he wished. Whether that be strengthening, reinforcing use of techniques or projection.

However while the system's description did say a lot of positive things about each section, all of it didn't come without a prize. He needed energy. A lot more than what he has now.