The Strongest Assassin Reincarnates in Another World

As Aiden was looking at the red and black skill book, a system panel opened in front of him.

[You have obtained a skill book.]

[Skill Book]

[Regeneration]

[Rank: Green]

[Restrictions: None]

[Cost two Mana to activate.]

[Description: This skill will make it possible for the user to heal at a higher rate than before, injuries while fighting will heal faster. However, since the user isn't a Cyclops, the effects of the skill have been reduced by a big margin.]

'Wow, this looks great!' thought Aiden, looking at the description of the skill in front of him.

The description of the skill was quite good and the fact that it had no restrictions was even better but that meant Aiden wasn't going to be able to test the reaction of the system to him learning skills that are class restricted. It was also written that the skill effects would be reduced because he wasn't a Cyclops, did that mean he would be able at some point to change his race?

Aiden didn't waste time and decided to learn it since it seemed to be a great skill to start off.

[Learn the skill <Regeneration> ?]

Aiden seeing the message tapped the on the screen [Yes], and the book that was in his hands started to disappear, it was the same effect as when he had killed monsters.

This time he didn't feel anything different in his body which caused him to think if it worked. To make sure, he decided to test it by hurting himself by taking his mace and hitting his arm until it started to bleed.

*Bang*

His arm was now completely submerged in blood. Aiden made a face that indicated he didn't like the moment but he not wanting to miss the effects of the skill, he started to analyze the changes to his wound.

Fifteen seconds later, the wound had healed up and no more blood was coming out of it. The skill was in fact not as good as when the Cyclops had used it but it would surely help Aiden in the future in his second trial.

[You have learned the skill <Regeneration>.]

[You have only 4 skill slots left.]

[It is level one, to level up your skills you will need to use them over and over again. However, the skill being Green rated would never be able to compete with a Blue skill even if it's level max.]

'What there's skill slots?'

Aiden was shocked, he didn't know why didn't the system tell him that before he learned it, it was crucial information.

'Did the system do it on purpose?' thought Aiden.

But he quickly dismissed the idea, thinking that such things were not possible for a machine. However, it now meant that Aiden could only choose four other skills for his future and the skills chosen needed to fit perfectly with his fighting style.

Luckily, Aiden was happy with the skill he had chosen, but the one thing that was disturbing him was the rank of the skill, it didn't seem to be high. Wanting he decided to do something he hadn't thought of before, ask the system.

Aiden didn't know if the system would be able to answer him but he still asked, if it could maybe the system could help him understand some aspects of the world that surrounds him.

Surprisingly, a beeping sound sounded in the head of Aiden.

'System what do those ranks mean?' asked Aiden, inside of his mind.

[Skills are separated into different ranks, the lowest one is gray. Gray skills are most of the time not useful and are not powerful. Green is the rank after Gray, Green skills are somewhat useful but are pretty situational. Afterward, you have in order, Blue, Purple, and Orange skills. Skills will be more powerful depending on the rank they possess.]

Aiden had actually put a green skill, in his slots. Wasn't this bad, if he waited he probably could have gotten a better skill. This caused Aiden to ask a question to the system, once again.

'Can we change the five skills chosen or are they forever going to be there?'

Another beeping sounded in his head.

[Skills learned cannot be removed, but you change them for their upgraded version. For example, you have the Gray book of the skill [Swift Strike] well you will be able to change it to a green, blue, purple, or even orange. However, most skills don't have higher ranks and you will not be able to upgrade them. Oh, forget to mention it, but skills have a really small chance to evolve, if they are in the right conditions to do so.]

The system confirmed what Aiden was thinking which was that he could never change the skills chosen, but the last bit of information given by the system was quite interesting, the skills would be able to evolve by themselves.

'What are the conditions for the skill to evolve?'

But this time, no beeping sound could be heard. Aiden tried once asking the same question but he had no answer for the second time in a row. Was the system keeping some information secret from Aiden?

Noticing that the system didn't answer anymore, Aiden decided that it was time for him to finally leave his room and explore the world he had been transmigrated to.

He headed to the door towards the door, to see just in what neighborhood he lived.

As he was starting to open the door, knocks could be heard on the other side of the door.

'Just who would come here? Didn't I live alone?' thought Aiden, thinking about who it could be.

The door was not in good condition and had small cracks in it that allowed Aiden to see bits of the person on the other side of the door.

He could see clothing that seemed to look like some type of dress. It seemed that a girl had visited him.

'Why would a girl visit me? Just who is she?' thought Aiden, trying to access the memories of the old owner but it had been a while since he wasn't able to access them anymore.

It seemed that he would have to open the door to see who was knocking.