Utopian System

"Interesting," he murmured, observing how the cores stopped meters before reaching the tunnel's ceiling in that section.

This space became his refuge during rest periods, allowing him to sit on the accumulated cores without fear of being crushed.

To better understand the phenomenon Elio observed in his sealed tunnel, we could compare it to the functioning of a water seal in a modern toilet, although this concept didn't exist in Elio's world.

In a toilet, the water seal is a curve in the pipe that maintains a small amount of water, creating a barrier that prevents gases and odors from the drain from returning to the bathroom. Pure physics.

Similarly, the way Elio had built his tunnel created a space where cores couldn't completely fill due to pressure, forming a free space that provided him with a small refuge.

Elio, unaware of this comparison, simply appreciated the space that allowed him to rest without having to absorb the cores, seal the rear, or open more small holes.

In this small sanctuary, he began to spend more time interacting with his invocations.

"You know," Elio said one day, as he paused to rest his mind if not his body, "I wonder what the others are doing back in the city. Do you think they're worried? Or maybe they're just getting on with things, assuming I'll be back when I'm back."

Wide Guard trumpeted softly, as if in response. Elio chuckled, patting the elephant's trunk.

"You're right, buddy. No use worrying about that now. We've got a job to do."

The days turned into a monotonous but necessary routine. Build, seal, rest, repeat. To combat boredom, loneliness, and the growing sense of hunger, Elio alternated between his invocations, finding comfort in the company of his magical creatures.

"At least you don't need to eat," he joked with his ice penguin one day, his stomach growling in protest at the lack of food.

One day, he decided to summon his frog, a creature he had used little since obtaining it. The frog appeared with a soft "plop", looking at Elio with its large bright eyes.

"Hello, little one," Elio said, watching how the frog adapted to the confined space of the tunnel. "We haven't spent much time together, have we?"

The frog croaked softly in response, jumping from one side of the tunnel to the other. Elio couldn't help but smile at its agile and graceful movements.

"You know, you need a name," Elio reflected. "Let's see... How about Soak?"

The frog seemed to consider the name for a moment before emitting a croak that sounded almost approving. Elio laughed, surprised by the creature's apparent intelligence.

"Soak it is, then," he declared, watching as the frog - now Soak - hopped between the tunnel walls.

After playing with Soak for a while, Elio decided to change company. Changing pages in his book, the frog disappeared and in its place appeared his rabbit.

The rabbit, with its soft fur and alert ears, looked at Elio curiously. Unlike the energetic Soak, the rabbit seemed more cautious, sniffing the tunnel air with caution.

"Hey, buddy," Elio greeted, extending a hand towards the rabbit. "You need a name too, don't you think?"

The rabbit approached slowly, its whiskers trembling as it sniffed Elio's hand. Suddenly, it gave a small jump and gently hit Elio's hand with its tail.

"Wow!" Elio exclaimed, surprised by the gesture. "You have a pretty strong tail for being so small... I know! I'll call you Iron Tail."

The rabbit seemed to approve of the name, moving to curl up next to Elio. They spent a while like this, with Elio gently stroking Iron Tail's mana fur while reflecting on his mission.

As the days passed, Elio alternated between his invocations, finding comfort and amusement in their company.

Ember provided warmth and more intense light in the darkness of the tunnel.

Gust, the swift swift, reminded him of the freedom of the open sky.

Wide Guard was a comforting and strong presence.

Each invocation had its own personality and unique abilities.

Soak was playful and agile, able to find and point out the smallest drops of moisture in the tunnel. Iron Tail was cautious, its sharp hearing alerting Elio to any change in the sounds of the surrounding cores. Ice Ball, with its curious and aggressive nature, often made Elio laugh with its small charges as it slid at his feet.

"I don't know what I'd do without them... They make all this a little more bearable."

As the tunnel grew, meter by meter, day by day, Elio found himself developing a deeper bond with each of his invocations.

♢♢♢♢

Upon reaching around 150 hours, Elio paused to evaluate his progress. He had managed to build approximately 100 meters of vertical tunnel, an impressive feat considering the circumstances, but still far from the surface of the sea of monsters.

"It's time to rest and recover mana," he told himself, feeling the mental exhaustion of days of intense concentration.

Elio settled at the top of his carbon tunnel, his body heavy with the accumulated fatigue of days of incessant work. Although his mind was buzzing with anticipation of what was to come, he knew he needed this last rest to recover his mana.

Hunger gnawed at his stomach, a constant reminder that his time in the sea of monsters was reaching its limit.

"Just a little more," he murmured to himself, his eyes involuntarily closing. "One last effort."

Sleep enveloped him quickly, his body grateful for the brief respite. In his dreams, he saw fleeting images of the city, of his friends, of everything he had left behind. These visions only strengthened his resolution to return.

♢♢♢♢

When he woke up, Elio still felt hungry, but he was no longer sleepy and his mana was fully restored. Without wasting time, he began the final task: absorbing the cores that separated him from the bottom Locus of the sea of monsters.

This time, the absorption was different. He couldn't afford pauses or breaks. He needed to create a hole large enough for the monsters to descend and see the tunnel directly.

It was the moment of truth.