Hogwarts wizards who signed in to Middle-earth...

This potion is, strictly speaking, a failed attempt at making.

When Dui was making the scabies potion, he deliberately added porcupine quills directly into the potion before turning off the fire, which turned the scabies medicine, which was supposed to treat scabies, into a highly corrosive liquid.

Dui carefully opened the potion bottle, then used a levitation spell to control it to hover above the ogre cauldron. The potion then lost its support and fell directly into the cauldron.

"Plop!" A sound came from the big pot.

"Hey, what fell in there?" one of the ogres asked curiously, then looked up at the stone wall above the cave. "Was it a rock?"

"Who cares what it is, I'm starving anyway!" another ogre said indifferently, then picked up a large bowl, scooped the food from the pot into it, and then ate it like crazy.

Seeing this, the other ogres quickly joined in the scramble for food, afraid of falling behind and missing out.

After they had snatched all the food from the large pot, the glass bottle that appeared at the bottom of the pot stunned the cannibals.

"What is this?"

"It looks like something human."

Why would human-related substances appear in food?

Before they could even figure it out, they felt a sharp pain in their stomachs. Their stomachs, small intestines, and large intestines felt like they were being corroded and melted. The excruciating pain of their intestines being ripped open caused all the ogres to collapse to the ground and wail in agony.

The deafening wails echoed throughout the cave, attracting the attention of the humans in the cells.

Even with such a commotion, it failed to wake the fast-sleeping ogre leader.

Taking advantage of your weakness, Dui and Gandalf immediately made their move.

Gandalf borrowed Duy's flaming sword and plunged into the wailing, fallen trolls, leaping and reaping their lives with the flaming sword.

Dui then approached the unconscious ogre leader and used a levitation spell to make the giant hammer float into the air.

The giant hammer was made of iron and was extremely heavy, weighing over a thousand pounds. Even with the levitation spell, Dui had great difficulty controlling it.

Once the giant hammer had floated to a certain height, Dui withdrew his magic, and the hammer fell freely, smashing heavily into the head of the ogre leader.

A heavy object weighing over a thousand pounds fell from the sky, instantly smashing the ogre leader's head, leaving it covered in blood and dented.

The trolls were indeed formidable in defense; their attack failed to kill the troll leader, instead waking him from his slumber.

But before it could make any other move, the giant hammer slammed down again.

This time, the troll leader was not spared. His head was smashed open by the giant hammer, his brains splattered, and he died instantly.

Gandalf moved quickly, his body agile beyond that of an old man, and he dispatched the ogres one by one with a single sword strike.

Soon there wasn't a single living troll left in the cave.

After the battle, Gandalf, without taking a breath, went straight to the prison where humans were held, cleaved the cage open with his sword, and released everyone inside.

The task of comforting people was left to Gandalf, while Duy went off alone to find the ogre's treasure.

He continued deeper into the cave and soon found the end.

At the end, there was a pile of gold and silver treasures, which shone brightly under the glow of the fireflies. The amount was several times that of the treasures in the caves of the five ogres!

But just as Dui was marveling at the sheer amount of treasure, he accidentally discovered a black object radiating magical energy buried among the gold coins.

Curious, Dui went over and used his wand to pry open the gold coins on it.

Once fully revealed, it turned out to be a black crystal sphere the size of a head.

Upon closer inspection, it appeared to be a sphere polished from a single piece of black crystal, with a faint, swirling mist inside, flashing various blurry images.

"What is this?" Dui cautiously touched it with his wand, and only dared to touch it with his hand after finding no reaction.

The moment it was touched, the black crystal ball reacted instantly, emitting light, and the mist inside transformed into a clear image.

The scene depicted in the image is strikingly different: Gandalf comforting the villagers on the other side of the cave.

Gandalf, as if sensing something, roared into the void, "Who goes there?"

Dui was startled by Gandalf's gaze, which seemed to be looking directly at him from within the crystal sphere. He immediately shouted towards the cave entrance, "Gandalf, come here for a second!"

Upon hearing Dui's call, Gandalf headed towards Dui, and his figure was displayed on the crystal sphere in a dynamic perspective.

"What's going on?" As the footsteps drew closer, Gandalf entered the treasure cave.

Dui showed the black crystal sphere to Gandalf, "Gandalf, can you tell what this is?"

Upon seeing the black crystal sphere held in Duy's hands, Gandalf was greatly surprised and blurted out, "The Crystal of Knowledge!"

Then it dawned on him: "No wonder I felt like someone was watching me earlier, it was the True Knowledge Crystal in your hand!"

"You're incredibly lucky to have found a True Knowledge Crystal! It's a treasure everyone dreams of!"

Gandalf couldn't help but feel envious.

"Gandalf, you say this is the Crystal of Knowledge?"

“Absolutely right,” Gandalf said with certainty. “I have seen other Knowledge Stones, and apart from their size, they are no different from other Knowledge Stones.”

Upon hearing Gandalf confirm that it was the Crystal of Knowledge, Duy, though he had already suspected it, still couldn't help but feel a surge of joy.

The True Knowledge Crystal is a magical artifact that allows users to see events that occurred in the distant past or in faraway places. Those with strong will and a powerful mind can also direct their gaze to wherever they wish to see.

It can be said that with the True Knowledge Crystal, he is essentially given a clairvoyant eye, enabling him to win battles from afar.

It can even be used to see things from long ago and explore ancient secrets.

However, Gandalf immediately warned Duy: "Duy, you must use this Knowledge Crystal with caution, especially do not use it to try to contact other Knowledge Crystals, because you have no idea who else is using other Knowledge Crystals whose whereabouts are unknown."

"I understand, thank you for reminding me. I will use it carefully." Dui nodded seriously.

As far as he knew, both the demon king Sauron and the white wizard Saruman possessed a True Knowledge Crystal. Saruman was corrupted by Sauron after using the True Knowledge Crystal, and thus chose to betray the side of justice.

Even Saruman could be corrupted by Sauron through the Crystal of Knowledge, so he naturally wouldn't be so presumptuous as to try to contact other Crystals of Knowledge.

Duy was overjoyed to have acquired the Crystal of Knowledge, a treasure that even Gandalf envied. Even the vast amount of treasure in the cave failed to excite him.

Gandalf has comforted the villagers outside who were imprisoned and kept by the ogres, rekindling their hope and courage.

As before, the two distributed a portion of the money to the villagers, instructing them to take it and leave the area, either by boat south to the Southern Human Kingdom or west to the vicinity of Dui's Cloud Peak or further west to the town of Buri.

Dui summoned another cobra that knew the way, and the fearful villagers followed the cobra out of the forest.