I Can Upgrade My Talent In Everything

eaglesnovɐ1,сoМ 

After several hours of intense planning, Fein leaned back in his chair, rubbing his eyes wearily. He had a headache from all the thinking, but he knew that he was one step closer to achieving his goals.

He stood up and stretched his limbs, making his way over to the window. He looked out at the moon once more, feeling a sense of excitement and trepidation wash over him. He was about to embark on a dangerous journey, but he was confident in his abilities and knowledge.

"I'll become a demon," he whispered to himself, his voice filled with determination. "And I'll obtain the knowledge I need to fully understand magic power."

With that, Fein turned away from the window and headed off to bed, ready to begin his transformation into a demon and start his mission in the morning.

...

Fein opened his eyes, feeling the weight of nostalgia in his chest. He had been dreaming of Sofia again. It had been months since they last saw each other, and he couldn't help but miss her terribly. He sat up in his bed, rubbing the sleep from his eyes as he gazed out the window at the early morning light.

He let out a sigh and got out of bed, feeling a sense of loneliness wash over him. He knew he had important matters to attend to, but he couldn't shake off the thoughts of her. He made his way to the kitchen, hoping that a cup of coffee would help clear his mind.

As he brewed the coffee, he couldn't help but think about all the times he had spent with Sofia. The moments they had shared, the laughter they had exchanged, and the comfort he felt being with her. He missed her smile, her warmth, and her touch.

He sat down at the table and took a sip of his coffee, lost in thought. He wondered what she was doing, if she was thinking of him too. He knew he had to focus on the present, on his duties, but it was difficult when his mind kept wandering back to her.

Fein let out another sigh, feeling a sense of longing and melancholy. He missed her more than he had realized. He wondered if he should reach out to her, but he knew it was complicated. He couldn't disturb her training, right? 

He pushed the thoughts aside, knowing that he needed to focus on the task at hand. But as he got up to leave the kitchen, he couldn't help but feel a sense of emptiness inside him. He missed her, and he didn't know when he would see her again.

Fein shook his head, trying to clear his thoughts as he made his way to his desk. He had work to do, and he couldn't let his personal feelings get in the way of his plans. But as he sat down, he couldn't help but feel a twinge of sadness in his heart. 'Well, I should execute my plan now."

...

Fein had made up his mind. He was going to enter the Abyss and immerse himself in the demon society to gain a better understanding of their ways and obtain more powerful spells. But before he could do that, he needed to do his research. He knew the Council's Library was the best place to start.

Entering the grand library, Fein was in awe of the vast collection of ancient texts and tomes. The shelves stretched from the floor to the ceiling, and the smell of old parchment filled his nostrils. He walked through the rows of books, running his fingers over the spines, trying to find the right ones that would help him in his research.

He finally found what he was looking for: a section dedicated to the Abyss and its inhabitants. The books were old and dusty, and some of them had bindings that were falling apart. But Fein was undeterred. He pulled out one of the books, and it creaked as he opened it.

As he read, Fein was lost in thought. He learned about the different demon clans and their customs, their languages and symbols, and their hierarchies. He read about their beliefs and their rituals, and he was surprised by how much he didn't know. Though, the information was outdated and some of them were only general information... 

After all, humans didn't witness the Abyss in their own eyes and no one managed to come to that place in the long span of history. A mysterious and extremely dangerous place. No one would attempt to infiltrate the Abyss, except for Fein who was a madman and have confidence in his strength and concealment.

Infiltrating the Abyss was equivalent to suicide for others due to the presence of Satans and the Demon God.

Fein spent hours in the library, taking notes and making copies of important texts. His eyes grew tired, but he was determined to learn everything he could. As he made his way out of the library, he was lost in thought, contemplating the information he had just absorbed.

He knew that this was just the first step in his plan to enter the Abyss. But Fein was prepared to do whatever it took to achieve his goals.

As Fein continued his research on the Abyss and its inhabitants, he knew that he needed to disguise himself as a demon to avoid detection. He knew he had to be careful in choosing a form that wouldn't draw suspicion. He was aware that transforming to his original demon form which look more like a human wouldn't suffice, he needs to change it and make it look domineering. Fein closed his eyes and concentrated, calling upon his power to transform himself into his demon lord form.

Fein's body began to glow, and his human features started to shift and contort. His hair grew long and white, his eyes turned crimson, and two dark wings sprouted from his back. His two long curved horns emerged from his forehead, and the scent of sulfur filled the air. As the transformation ended, Fein looked at his reflection in a nearby mirror. He was surprised to see a powerful demon lord looking back at him.

"Wow, this is incredible," he muttered to himself, admiring his new appearance. "I almost look like a natural-born demon."

Fein walked around the library to test out his new form. His movements were slower and more deliberate, and he found that his demon body required more strength and energy to move.