The theory is feasible.
Next up is the practical application.
Keare was already very proficient in the practical use of the 'Recovery' magic, as soft light continuously appeared in his palm.
Suppressing his nausea, his palm just touched the Goblin in front of him.
The scene of his limbs being brutally severed in the previous battle gradually appeared before Keare, and he decisively stopped using the healing magic.
Looking at the monster's wounds, which were now healed and no longer bleeding.
He frowned slightly; the result was already very clear before him and did not develop as he had envisioned.
"What went wrong?"
Magic.
To fully understand its concepts was a bit too much for Keare, who came from modern society.
The current situation was akin to getting a 0 on the Bilibili entrance exam after filling out the answers for the college entrance exam, and then having his family pay for a vocational college diploma.
He received an admission letter from Hogwarts but couldn't find Platform Nine and Three-Quarters at all.
"If I remember correctly…"
"The magic power in the Dungeon or Familia world should not have the concept of attributes."
Keare's tightly furrowed brows did not ease; he could only continuously recall the details he had overlooked in the anime from his previous life.
The most direct example was Loki Familia's Vice Captain, "Nine-Demon Princess" Riveria Ljos Alf, who was Orario's strongest mage.
Her title only came from her ability to produce nine effects from three magic slots.
And magic power was more like a generalized mental energy; dizziness when low on mana should be due to excessive mental energy consumption.
"Then, through consciousness... the manifestation of mental energy, can it change the output form of magic power?"
Even without considering Hestia's relationship with Loki, as a passerby, he had no way of contacting "Nine-Demon Princess" Riveria.
Keare could only let his thoughts wander.
Fortunately, he still had ample time; he looked at the Goblin material in front of him.
He decided to try using the "change mental energy method" to see if 'Recovery' could be transformed into the skill effect of 'Deterioration'.
"Obtaining magic through grimoires."
"It also shapes magic abilities based on the user's thoughts and experiences, like the Rabbit's Firebolt; it seems to follow this process."
"This method might work?"
Keare was prepared for failure; after all, it was a self-developed skill, but just as he tried to twist the form by changing his thoughts.
Before he even touched the Goblin, the monster, whose healed wounds had improved, struggled continuously, trying to bite the human in front of it with its teeth.
He didn't pay attention.
"Deterioration?"
He activated the 'Recovery' magic, but no soft light symbolizing healing appeared in Keare's palm; his mental energy was suddenly drained.
Suddenly, his vision went black, and he almost collapsed to the ground.
But when he steadied himself and looked at the Goblin, which was completely weakened and barely alive, his eyes were filled only with the excitement of successful skill development!
"Did I… succeed?"
Through healing Recovery, the Goblin only had severed limbs.
But through the 'Deterioration' skill just now, the monster in front of him looked as if… its internal organs had suffered comprehensive damage, completely withered.
To experiment with new skills, one must, of course, use the most stable controlled variable method.
Keare looked at the incapacitated Goblin, decisively ended its life with a short sword, and after picking up the dropped loot.
He did not rashly begin exploring.
Using 'Recovery' magic was already tiring, not to mention a second use of the 'Deterioration' skill after changing the magic power output form.
Going to conquer monsters with a head full of passion and new skills?
Adventurers with such thoughts often perish in the Dungeon, and it was precisely because of his own weak and insignificant strength.
Keare always maintained reverence for this unknown Dungeon.
"Experiment a few more times; if the results are similar, it can be confirmed that it should be a derivative ability of 'Deterioration' that has been developed."
He found a quiet dead-end passage.
Keare continuously rested until the dizziness from mana depletion gradually disappeared, and his own condition was sufficient to face the dangers encountered in the Dungeon.
Only then did he resume his exploration.
The target was still weaker monsters, handled in the same way as before; looking at the monster lying on the ground, he did not hesitate at all.
'Deterioration'
He used the skill again.
A familiar dizzying sensation enveloped Keare, but this time he witnessed it firsthand—
The Goblin monster, with its torso severed, its muscle tissue was visibly shriveling like a deflating balloon.
"This is the feeling!"
Keare's brilliant smile could not hide the deep fatigue in his eyes.
The effect of the 'Deterioration' skill was indeed overpowered, but its downside was equally obvious: its use consumed a huge amount of magic power and stamina.
It still could not achieve the effect of the Legendary Hero using it at will.
But considering that the Legendary Hero accumulated terrifying ability values through 'Plunder', he realized that he didn't need to worry about this problem at all.
"I can't get the Divine Armor Geaorgius."
"Otherwise, 'Deterioration' would be my biggest trump card in the Dungeon or Familia world, and the crucial Divine Armor also has a passive effect of health lock and life preservation."
Spreading the 'Deterioration' ability to a 1-meter radius.
Instead of having to directly touch the monster to successfully cast the skill, as it was now!
Even so, Keare's excitement remained unaffected because he not only mastered the 'Deterioration' skill.
The key was to figure out the path of skill development.
'Optimization'
'Plunder'
These were just directions provided by the Legendary Hero's path.
But following this path, without that oppressive environment, it would ultimately only be a deteriorated copy of the Legendary Hero.
"I must forge my own path as a Healer."
Having determined his next goal.
Keare continuously explored deeper into the Dungeon, pressing on, and then developing the 'Optimization' skill, which substantially improved his strength.
His ability values had already exceeded the standard for shallow-level exploration.
With his mastered combat techniques as a bonus, clearing the monsters blocking his path was incredibly easy for Keare.
Soon, he successfully reached yesterday's limit, which was the 5th floor area.
The surrounding environment was exceptionally quiet, visibility was low, and no traces of monsters could be found, but Keare did not let his guard down.
When several dark shadows appeared on the ground ahead, continuously coalescing into humanoid "rookie killer" War Shadows, the crisis was fully upon him.
"3 monsters?"
"No… they're still coalescing!"
Keare had combat experience with War Shadows, but he had never encountered so many at once; in this situation, he did not retreat at all.
Referencing the method for activating the 'Deterioration' skill.
He changed the form of the 'Recovery' skill, which restored his body to its initial state, and ultimately manifested it as a temporary enhancement of his ability values.
'Optimization'
"Very good."
"Let me test the limits after optimizing my ability values!"