Reincarnated Devil's Strongest Hero Training Plan ~The baby he picked up has grown up so well that his father is confused~ - Chapter 129

Reincarnated Devil’s Strongest Hero Training Plan ~The baby he picked up has grown up so well that his father is confused~

Chapter 129   The Great Magical Power of the Boiling Demon King

In a corner of the Demon King’s Castle, which served as Hades Lucifer’s private chamber and was protected by a powerful barrier that prevented teleportation to the human world, two figures watched the crystal ball displaying the hero’s party. They were also indulging the whims of the little princess Hades while monitoring their progress.

There seemed to be significant movement on the human side.

“Ah!? They’re finally on the move! Is Ars-kun coming here!? Wh-what do I do!? My room isn’t cute at all! What should I do, old man? Help me!”

Hades was in utter chaos.

“Calm down, my captive princess. They’ve only just started heading towards the location advised by the mysterious alchemist, Sun-Q. There’s still a long way to go before they reach the Demon King’s Castle. Though, I didn’t expect them to come with such a large group…”

The mysterious alchemist, or rather, the split form of the low-class demon Kakyu, disguised as Sun-Q.

He had developed a certain magical tool to help pinpoint the source of the demonic outbreaks and had handed it to the hero’s party. This necklace-like device detected strong spatial distortions and pointed the way to the destination like a compass. However, simply knowing the direction was far from enough to reach the Demon King’s Castle.

As they approached the spatial distortions, they would encounter increasing numbers of powerful demons that would form a formidable army standing in their way. The difficulty of this task was something all who had survived the war understood well.

…Although, considering the hero had become too strong and the Demon King had to be fortified by the low-classr demon’s power to avoid being killed in one strike, it might not be as difficult as it seemed.

Regardless, thanks to the valuable magical tool from the alchemist Sun-Q, the hero’s party had resolved to venture into the demon realm to strike at the heart of their enemies.

Of course, the renowned heroes gathered on this continent did not approve of sending only the hero’s party into the danger zone.

Naturally, they rose up to support the hero, humanity’s trump card, and volunteered to accompany them. These were individuals with strong wills, determined to follow the hero regardless of any objections.

This was particularly evident in the case of Marsley Rulans, the first prince of the Kingdom of Rulans. The prince, casting aside his royal status, volunteered himself and his retainers to act as a protective barrier for the hero.

Even though the prince himself might not possess the power to turn the tide of battle, his presence meant that the powerful retainers of the greatest magical nation on the southern continent would be compelled to accompany him as shields for the hero. Understanding this, he prioritized the hero’s safety above all, aiming to contribute to humanity’s victory.

The likelihood of the prince surviving the demon realm with this method was likely less than one in ten thousand. Yet, his resolve and determination, fueled by the devastation of his homeland, remained unshaken.

The sight of a royal, willing to risk death to aid the hero, struck a chord with knights, soldiers, and adventurers alike. This inspired a unified response: “Take me too! Take us with you!” Their collective roar shook the ground, fostering a sense of unity among all humanity.

Most demons had already been pushed back from cities and towns, and even if attacks occurred, the stationed defense forces could manage. This made it clear that now was the time to strike back against the demons’ advance.

Understanding this, even the generals of the Kingdom of Rulans, who prioritized the prince’s survival, permitted his participation. One general, despite his few words, expressed a deep-seated resolve: “If it must be, then let it be me who dies before His Highness.”

Though the general’s terse response might have seemed straightforward to outsiders, it undoubtedly masked profound anguish and inner conflict.

“Still, who is this guy named Sun-Q? Developing a magic tool that detects the concealed teleportation gate of that evil old man… he can’t just be a regular human.”

“Oh, uh, surely he’s a handsome guy with incredible power and a wonderful personality…”

“Huh? I didn’t ask for that, old man. What’s with the sudden praise?”

Even Hades seemed unable to imagine that the low-class demon currently monitoring her was sending a doppelgänger to the human world, hence her puzzled response.

As they continued their leisurely conversation, which hardly seemed fitting for a wartime situation, an immense surge of magical power suddenly erupted, interrupting them. The Demon King’s amplified and expanded power was now so vast that it seemed capable of enveloping the entire demon realm, creating an illusion that it was spilling out of the Demon King’s castle.

Feeling this surge up close, Hades was so shocked that she nearly collapsed. Even though she knew her father would never harm his own daughter, she couldn’t stop sweating nervously.

“Looks like seeing the hero your daughter is smitten with in action has fired up the Demon King’s power. He’s really getting ahead of himself.”

“Wh-what are you talking about, evil old man! My father is totally serious! I’ve never felt his full power like this before!”

Imagining a clash between the hero and the Demon King, Hades began to panic, fearing the worst possible outcome. Meanwhile, the low-class demon, who also felt the intense magic up close, sighed nonchalantly with a look that seemed to say, “What a hassle.”

Given that the long-awaited final battle was approaching, it’s understandable that using the borrowed power like an excited child might lead to such consequences. Still, both of them seemed genuinely interested in the clash between the hero and the Demon King.

Incidentally, the surge of magic power released by the Demon King at this time caused an enormous disturbance, shocking all the nearby demons below the upper ranks. The weaker ones even fainted, illustrating the magnitude of the disaster.

The power was so immense that even a minor surge was enough to make upper-rank demons faint. Those aware of the reality could only imagine in horror how much the low-class demon had amplified the Demon King’s strength.