Leaving aside Chinese cultivation for now, nutrient solutions that are easily absorbed by the human body are indeed feasible and could significantly increase Ronen's growth rate.
Through Adjustment Magic, he could quickly adjust his own state, possessing more sustained combat ability and research time.
However, this time's greatest gain was confirming the magic to be taught to the Hera Familia.
Setting aside the difficulty of Innate Magic, just the method of use is more cumbersome than acquired magic, making it difficult for people without magic talent to learn.
Even if learned, it is extremely difficult to use.
Therefore, Ronen needed to simplify the magic content taught to the Hera Familia as much as possible.
Adventurers have extremely high attack, defense, speed, physique, and vitality; their hexagonal stats are very balanced.
Their recovery ability is lacking, not comparable to non-human existences like vampires, etc .in other works, but it can be replaced to some extent by recovery potions, so there are basically no major weaknesses.
But—having no major weaknesses also means having no major advantages.
Even if a professional Magic possesses world class power, this level of power is undoubtedly very low-tier in front of black dragon.
Having been baptized by the information explosion, Ronen marveled at the physical strength of Adventurers, but at the same time, he deeply understood that the power system of this world was actually lack creativity.
Especially the magic system, which is the most important in an otherworld, its development level is too low.
Even though Ronen has tried his best to compensate, he still cannot fill a thousand-year gap of development in a short time.
Therefore, he could only ponder, what is needed for a Black Dragon subjugation battle, assuming the preservation of live both familia.
Undoubtedly, what they needed most is mobility and defense, not offense. It won't work, if they can't survive a single attack
In addition to Magic for magic training, there are also Flight Instant Movement Magic and Heartguard Armor.
Even if one is fundamentally stupid, they wouldn't be unable to master at least one of magic, right?
Returning to Hera Familia, after purchasing materials, Ronen attempted to create nutrient fluid.
Although he didn't have 'Harmony' as a development ability, Ronen, after observing a senior alchemist making potions, also mastered the method of mix potions with mana.
Coupled with his Detection Magic being able to precisely detect the process of potion fusion and its effects on the human body after drinking the nutrient fluid, Ronen only took two days to complete a nutrient fluid that was easily absorbed by the human body.
"Speaking of which, this is already enough to be sold as a product."
Ronen thought of this point.
However, he was not in a hurry for money, and his attention was elsewhere, so he didn't think deeply about it.
After adjusting his curriculum and perfecting Flight Instant Movement Magic, Ronen came to Hera Familia's library.
The two great Familias that descended upon the earth a thousand years ago possessed many original Magic Grimoires.
To a certain extent, Ronen's Magic research had reached a bottleneck.
Aside from daily training, the rest was to accumulate Magic knowledge.
"Ronen."
Hearing Alfia's voice, Ronen looked up; she handed him a book.
Ronen took it, and said with some surprise, "A Magic Grimoire?"
"Yes."
Alfia nodded and said, "I thought you would want to research Magic Grimoires. This one can be used as material for research and consumed."
"Thank you."
Ronen was a little surprised by Alfia's understanding of him, but thinking of Alfia's behavior during this period, he said, "Your mood hasn't been right recently; even Meteria noticed it."
Magic Grimoires were not precious items for either of them; they were indispensable, but their value was indeed not too high for them, so neither Ronen nor Alfia cared much.
Compared to a Magic Grimoire, Ronen was more concerned about Alfia's mood.
She... seemed to harbor a death wish; this was something Ronen had noticed a few days ago.
To some extent, Alfia was one of the people who trusted him the most among the main group of Hera Familia.
"You're making an unpleasant noise."
Alfia stared coldly at Ronen, and seeing his serious expression, Alfia could only endure her displeasure.
This man could see through her protective facade; this cold demeanor couldn't scare him away, and only at times like these would Alfia feel annoyed.
Unable to make Ronen back down, Alfia could only sigh inwardly, and after adjusting her mindset, she said, "I really can't rest assured about that child. If the Black Dragon is as powerful as you say, I really don't have the confidence to come back alive."
Wouldn't it be better not to go?
Ronen didn't say that, because he also knew the reason.
Whether for Hera Familia, for this world, or for herself and Meteria, she had to go.
Even if—there was a certain probability of not returning.
If, by any chance, an accident occurred, at least Ronen could protect Meteria.
In the original work, Meteria died not long after giving birth, most likely to eliminate the negative buffs on the child.
It was after that that Alfia lost the motivation to live.
After being found by Erebus, Alfia agreed to his invitation without hesitation and became the 'Necessary Evil'.
She also resented her fate; if she hadn't had a congenital terminal illness, she might have become Level 10 by now, and subjugating the Black Dragon would not have been impossible.
But what if she resented it again?
Ronen was silent for a moment; he no longer knew if he had done something wrong.
A butterfly flapping its wings does not necessarily lead to a good outcome; it just has a high probability of getting better... This was something he had already known.
It's not impossible for things to get worse, for example, being able to survive on the Black Dragon battlefield, but then dying in a fierce fight with the Black Dragon—this is also not impossible.
"Alfia."
Ronen, with a subtle sense of remorse, looked at Alfia seriously and said, "Please live, even for Meteria."
"You don't need to tell me that."
Alfia said impatiently.
"I thought so too."
Ronen smiled and said, "Magic Bullet, Vacuum Blade, Shockwave, you've already learned these three spells, right?"
Alfia nodded slightly, then Ronen raised his hand and gathered Magic in his hand.
The invisible Magic seemed to have no fluctuation , but it caused wind.
Then the wind turned into a storm, sweeping from outside in.
Non-attribute Magic, Spiral Magic.
"This is Spiral Magic; this form is already equivalent to advanced Magic, and this is just the basic of Spiral Magic."
Maintaining this Magic, Ronen looked at Alfia and said, "I hope you can learn this Magic ."
"Attack Magic ?"
Alfia stared at the Magic ball in front of her and said calmly, "I don't need attack Magic, and... the consumption of this Magic is not low."
Alfia had the ability to use swordsmanship just by seeing it once, and as a Professional Mage, Magic was naturally the same.
It was precisely because she possessed such powerful talent that she saw the essence of this Magic at a glance.
Unlike Ronen, who grew through cultivation, since God's Grace appeared in this world, there has only been one way to grow, and that is through combat.
Using Magic, consuming Magic, and then Magic grows—this process continues without a stable cultivation process, and because acquired Magic does not cause Magic outbursts, there is no need to train Magic control.