Decisive Battle Against the Colossus

Where was that sound coming from? Was it some phenomenon occurring within the strata, or had the rock collapsed somewhere? Allen pricked up his ears, but the underground palace remained deathly silent.

Allen recalled television shows he had seen in the past and pressed his ear against the stone wall to listen. It seemed he really could hear human voices. Allen's spirits lifted; having walked alone through the long, silent darkness for so long, it was a relief to hear the sound of a human being.

Allen pressed his ear to the wall again. Yes! There were indeed faint whispers. Although the sound was ethereal and indistinct, Allen still caught the word "lost," spoken in a low, sorrowful tone.

Relying on his keen hearing, Allen dashed rapidly in the direction from which the sound originated. The closer he got to the source, the more his spirits soared, for he recognized the voice as that of Albert, whose disappearance had left the entire family deeply worried. Suddenly, Allen's foot slipped. Moving too fast, he tumbled down an incredibly steep slope. His speed increased until he was practically falling. Allen couldn't help but roll and leap against the vertical stone wall as he plummeted. When he finally managed to steady himself, he saw Albert sitting dejectedly on the ground. He looked extremely weak, his beautiful, pure blue eyes filling with joy upon seeing Allen, only to be immediately clouded with concern.

"Allen, why are you here?" The unmistakable worry in Albert's tone moved Allen. Albert's condition was clearly dire, yet his first concern was his younger brother's safety.

"It's a long story. What happened to you? Why haven't you treated the wound on your leg?" As an Auror, Allen wouldn't be naive enough to think Albert didn't know healing magic.

"I think I was cursed; I've lost all my magic. I got lost in this palace and accidentally broke my leg," Albert said, briefly summarizing his situation.

Allen hurriedly summoned the Mobile Tower he had obtained earlier from the system. Concealing it with his sleeve, he pretended to pull it from his pocket. As the Mobile Tower landed on the ground, Allen activated the control spell, causing the top of the tower to just touch the ceiling of the stone chamber.

Allen helped Albert into the tower. "Incendio!" The massive fireplace immediately roared to life, and the temperature in the tower's hall became warm and comfortable. Allen helped Albert recline on a large sofa, took out the medical kit from the tower, and bandaged Albert's leg simply. "If you've been cursed, you don't need to worry," Allen said. "I had an encounter at Hogwarts and happened to obtain this Mobile Tower and a magic orb that can break curses."

Allen took out the Fools' magic orb and skillfully cast the spell. Albert felt a familiar surge of power flowing through his limbs—his magic had returned! Though still somewhat weak, Albert, now fully restored, was able to expertly treat his broken leg. By the time Allen had put away the orb and returned from the tower's kitchen with some food, Albert looked almost entirely recovered.

"Thank you, Allen. You saved my life." Albert didn't press Allen on how he had found him, nor did he ask about his adventures; he knew better than to pry into others' privacy and respected their secrets.

In just a few minutes, the two of them finished two plates of sandwiches and a large glass of milk, feeling much better.

"Allen, this underground palace is very strange; it seems impossible to Apparate. Even though my magic has returned, I still can't find a way out," Albert noted calmly. The relief was only temporary; if they couldn't escape the maze, they would eventually face the crisis of running out of food and water.

"It's alright, Albert. I believe that since heaven allowed me to find you, we won't be trapped here for long." Allen, of course, couldn't tell Albert that he had a magical map in his mind. Besides, he hadn't yet completed the system quest to seize the Moonstone.

After resting for a short while, the two decided to continue searching for an exit—though for Allen, it was a search for the Moonstone. As they followed the stone cavern forward, the space grew wider and the air gradually became damp. The stone walls were soaked with moisture, and many dark green mosses even grew upon them. Less than five miles further, an incredibly wide underground river blocked their path. Before the two could even discuss a strategy, massive waves erupted on the river's surface. The violent disturbance pushed Allen and Albert's vigilance to the limit; danger was right before them, and they had to be careful.

Amidst the churning waves, a sea-serpent-like monster about 30 feet long appeared like the Grim Reaper, blocking their way. The creature's body was like a giant cylinder with a short tail and limbs like oars, covered in layers of hard, armored scales. Its neck, however, was as flexible as a giant python, easily rising 30 feet high with a single lift of its head. Its movements kicked up mountain-high waves that even splashed the two as they retreated rapidly. It had discovered the two uninvited guests, Allen and Albert!

"It's a Plesiosaur! Allen, you go first, I'll hold it off!" Albert shouted in despair, his face deathly pale as he gripped his wand, determined to leave the chance of survival to Allen.

Allen was moved, but he could not retreat. The mission objective was just ahead, and he could not accept failure. Besides, he had a trump card for survival. Summoning Neptune, Allen vaulted onto its back. Albert shouted joyfully, "Yes, Allen! Quickly, ride Neptune and escape!"

Allen looked back at Albert with a confident smile, while simultaneously deciding in the system to use the remaining nine minutes of his "Invincible Aura." If he could finish it off within nine minutes, that would be best; if not, he would flee quickly.

Having made up his mind, Allen flew resolutely toward the massive beast. The Invincible Aura took effect once more; Allen felt as though he had an endless supply of magic and inexhaustible strength. He darted rapidly around the Plesiosaur. Although the monster's head was incredibly agile, it was still no match for Allen. The two engaged in a frenzied battle. Allen tirelessly cast one lethal spell after another. Many of the attack spells were ones he was using for the first time, yet under the shroud of the system's Invincible Aura, it was as if he had been born knowing how to use them, striking the Plesiosaur with steady, precise, and ruthless accuracy.

They moved from the shore and back again, Allen seemingly becoming one with Neptune, soaring and diving amidst the towering waves. Though Albert was desperate, he held onto a death-defying resolve, frantically casting every lethal spell he knew at the Plesiosaur.

Suddenly, both Allen and the Plesiosaur plunged into the depths of the water. After a moment, the Plesiosaur's massive head broke the surface. Albert's heart hammered against his ribs, unsure of Allen's fate!