Unlike usual skills, which use their host's mana, this one doesn't use mana at all.
Otherwise, Yuuki would never have been able to become a Saint so quickly during his fight against Guy Crimson.
The skill simply feeds on two fundamental elements present in an individual's soul: desire and will.
That's the fuel for this skill.
It's also one of the reasons why Gorou chose this skill and not Yuuki's unique skill Greed.
The second one is really scary, because it has the power to dominate human desires and submit them to the user's will.
The greater the desires, the easier it is to manipulate them.
The user can see through others' desires, control their target's desires, and push them to act according to their will... without them even realizing it.
A really tempting skill, but it harbors a hidden risk.
This danger is a woman named Maria.
Gorou still doesn't know how the system will handle this creature made of pure information, hidden or embodying the greed skill.
That's why he preferred to delay obtaining this terrifying skill.
Maria is an individual with whom Gorou definitely plans to negotiate sooner or later.
Why?
Because he wants to finalize the Yuuki model. So it's in his interest to avoid a conflict with an entirely informational life form.
Even the SCP Foundation hates this kind of entities.
Thus, the unique skill Creator was the only logical and viable choice in the Dragon Ball Z universe.
And that led him to this result.
Gorou could feel his mana... but also an unknown substance, never felt before, decreasing at an alarming rate.
However, his will and desire seemed to slow down this dangerous process.
[Confirmation completed. Acquisition of EX skill [Sage]... Successful. Continuing evolution of [Sage] to unique skill [Great Sage]... Successful]
An unknown voice then resonated within Gorou's very being.
"H... how? I... I'm not in the Central World, nor in a universe created by Veldanava..."
The only logical explanation that came to his mind: the system acts as an inter-dimensional gateway.
But if this is true, then it also provides important information about the current state of the Central World.
Normally, it's impossible to have two unique skills at the same time.
Of course, this is also the same for individuals.
The Parallel Existence skill is a different case of a person encountering another version of themselves from a timeline or universe.
But here's the thing... Gorou currently possesses two unique skills.
So two pieces of information that don't belong in a timeline possessing their existence.
One originally belonged to Rimuru Tempest.
The other is Yuuki Kagurazaka's skill.
What does this imply?
"Yuuki hasn't arrived in the central universe of this timeline yet... or, the Central World didn't consider my situation as a rule violation."
The second option is uncertain... but far from impossible.
We must remember that there were two Rudras present simultaneously in the central universe for quite a while.
The system corrected this bug in a lazy way: by blocking the information linked to Rudra's identity in Masayuki's mind.
The latter technically wasn't Rudra, because of this information sealing.
"So, the Central World's system must have found a solution to my problem."
That's the most plausible idea.
Gorou isn't in a universe under the Central World's jurisdiction, which are different realities created by Veldanava.
His existence and information don't conflict with Rimuru Tempest.
Of course, this includes Yuuki.
"Great Sage? Can you hear me..."
Normally, the skill needed a certain synchronization time between itself and its host's soul.
But, Gorou created it from the elements of his soul with the intermediary of the Creator skill.
The unknown substance he felt decreasing in him was identified as his magicules.
Probably an element provided with the Yuuki model.
[Affirmative]
A voice similar to the voice of the world from the Tensura universe responded to Gorou's words.
This proved his deduction.
"Excellent, I hope we'll work harmoniously together"
Since he plans to make Great Sage a "manas" in the future, Gorou prefers to treat him correctly now.
Especially since he needs him to counter Maria in the near future.
[Assisting you in a harmonious atmosphere is my reason for being]
A neutral, but logical response.
The current skill literally has no ego and only desires to serve Gorou efficiently.
"Can you give me a summary of your abilities?"
The Great Sage skill at his disposal is potentially different in some aspects from Rimuru's.
Why is that?
The Great Sage skill evolved enormously during the blue slime's adventure.
It brought itself modifications, thanks to new additional skills gained by Rimuru or itself.
Gorou wanted to know if he got the original or final version of this skill.
[Affirmative]
Gorou felt information wanting to penetrate his mind, but Stanford Pines' mental defense blocked the intrusion.
Which is a logical phenomenon, since even Bill Cipher couldn't access the scientist's mind without his permission.
After allowing the transfer, Gorou rejoiced even more.
[Additional skill Thought Acceleration: It allows the user to considerably accelerate their thought process.
They can adjust the level of acceleration according to their needs and extend the effect to other people.
The exact acceleration factor of their thought process varies from a few hundred to millions, even hundreds of millions, depending on individuals.
The two most common variants are a factor of a thousand, generally associated with unique skills, and a factor of a million, generally associated with ultimate skills.]
[Additional skill Analytical Appraisal: Analytical Appraisal releases waves that penetrate the analyzed target and perform a complete analysis of its composition, which is then sent back to the user.
The latter can thus obtain information such as the target's material composition, the amount of Magicules it possesses and if it's under the effect of Skills or Magic.
The power and precision of Analytical Appraisal vary according to the user's level.
While an ordinary person can only analyze something through prolonged physical contact, a more experienced user is capable of gathering information through sight or thanks to the additional skill Mana Perception.
However, direct physical contact seems to be preferred for optimal precision.]
[Additional skill Parallel Calculation:
It allows the user to perform multiple thought processes simultaneously. Possible applications include detaching the analysis of phenomena from the user's usual thoughts, and preserving consciousness by using additional thought processes as backups.]
[Additional skill Chant Annulment: It eliminates the need to chant when using magic after successful analysis or casting of a spell. The spell is stored in the user's mind and can be cast instantly by simply thinking about its activation.]
[Additional skill All of Creation: It allows the user to understand anything as long as they have a basic understanding of it and it's perceptible by the user.]
[Additional skill Analysis: The "absorbed" target is studied and analyzed.
Craftable objects can then be produced. If the required materials are present, duplicates can be produced. In case of successful analysis of a skill or magic, the same technique can be acquired.]
Originally, a part of the unique skill Predator was transferred to Great Sage when Predator evolved to the unique skill Gluttony.
This explains the "absorption" aspect in the additional skill Analysis.
"Great Sage, did the Analysis skill keep Predator's effects? If so, then how?"
You would have needed to have the Predator skill for Great Sage to obtain this aspect.
[This is an anomaly, which was possible thanks to two key elements according to your memories.]
[The first reason is your vision of my alternative version in possession of the entity named Rimuru and, the second reason is the power of your desires concerning the accumulation of knowledge.]
[In summary, you are an extremely compatible subject with the Creator skill thanks to your greedy nature.]
"I see"
He didn't express himself further.
His desire to have a harem is a selfish thing towards his partner, but Gorou wanted this path.
Out of nobility? No, but out of pure desire and whim.
He had the strength and technology for it, so why not?
It's as simple as that.
Like his son, the father and the Earthling in his body possess desires unsatisfied by a normal "civilized" society.
Surprisingly, this created a common point between him and the two individuals that are Yuuki Kagurazaka and Mariabell Rosso.
All three possess strong "desires", but oriented towards different goals because of their worldview.
Science with a touch of perverted selfishness for Gorou, while Mariabell wants domination of the Central World and Yuuki wants to create a fair world for everyone.
Three desires: one purely selfish but personal, another dominating, and the last idealistic.
'In the end, if I go to Tensura... only one will remain'
It's with this realization that Gorou began using [All of Creation], [Thought Acceleration] and [Parallel Calculation] on the documents concerning the pharmaceutical company's scientific work.
A few days passed.
...
"Are you my employer?"
In a luxurious room, created by Gorou with the purpose of impressing his guest, stands a man in traditional attire, observing his environment with a critical and indifferent eye.
However, his greed didn't escape Gorou.
"That's correct, Mr. Tao Pai Pai," he said, giving him tea containing his best leaves.
The mercenary hesitated for a moment, but the smell finally overcame his rationality.
'Hmm... this is really pleasant. I need to bring some back.'
Satisfied with the beverage, the martial artist turned his gaze back to Gorou, sitting across from him.
"Is the contract really for Commander Red? It won't be cheap."
At Tao Pai Pai's words, the scientist in the white coat sketched a smile.
"Your monetary price will be mine. But I want the Red Ribbon's weapon under control within the month."
Tao Pai Pai observed the scientist's face. No sign of lying, neither in his appearance nor in the tone of his voice.
After a short silence, he nodded.
"I'll mention the amount after the mission... but send me your tea regularly."
He left the meeting room with a calm step, after having torn out a pillar with a finger and toe strike, then nonchalantly carrying it on his shoulder.