This Potion, strictly speaking, was a failed Potion.
When Luke was making the Scabies Potion, he intentionally threw the porcupine quills directly into the Potion before the fire was extinguished, ultimately causing the Scabies Potion, which was originally meant to treat scabies, to turn into a highly corrosive liquid.
Luke carefully opened the Potion bottle, then used the Levitation Charm to control it, moving it above the Trolls' cauldron.
Immediately, the Potion lost its support and dropped directly into the cauldron.
"Plop!" A sound echoed from the cauldron.
"Hey, what fell in?" one of the Trolls asked curiously, then looked up at the stone wall above the cave, "Could it be a rock?"
"Who cares what it is, I'm starving!" another Troll said indifferently, then picked up a large bowl, scooped food from the pot into it, and began to devour it.
Seeing this, the other Trolls also quickly joined in the scramble for food, afraid of being left out and not getting any.
After all the food in the cauldron was snatched up, the glass bottle at the bottom of the pot made all the Trolls freeze.
"What is this?"
"It looks like something human."
"Why is something human appearing in our food?"
Before they could figure it out, they suddenly felt a sharp pain in their stomachs.
Their stomachs, small intestines, large intestines, and other organs felt as if they were being corroded and melted, and the pain of their insides being eaten away caused all the Trolls to fall to the ground, howling in agony.
The howls were deafening, echoing throughout the entire cave, attracting the attention of the humans in the prison.
But even with such a loud commotion, it failed to wake the soundly sleeping Troll leader.
Strike while the iron is hot; Luke and Gandalf immediately took action.
Gandalf borrowed Luke's Flame Sword and charged into the howling, fallen Trolls, leaping constantly, using the Flame Sword to reap the lives of the Trolls.
Meanwhile, Luke came before the unconscious Troll leader and used the Levitation Charm to control a giant hammer, making it float into the air.
The giant hammer was made of iron and was extremely heavy, weighing over a thousand pound, making it very strenuous for Luke to control with the Levitation Charm.
When the giant hammer floated to a certain height, Luke withdrew his magic, and the giant hammer free-fell, smashing heavily onto the Troll leader's head.
A thousand pound of heavy object falling from a high altitude instantly smashed the Troll leader's head, making it bloody, and a section of its head was dented.
The Trolls were indeed formidable in defense; one blow did not kill the Troll leader; instead, it woke from its slumber.
But before it could make any other moves, the giant hammer smashed down heavily again.
This time, the Troll leader was not so lucky; its head was smashed, its brains splattered, and it died instantly.
Gandalf's movements were also swift; his body was agile, unlike an old man's, and he dispatched the Trolls one by one with his sword.
Soon, there was not a single living Troll left in the cave.
After the battle, Gandalf didn't even catch his breath; he went directly to the prison where the humans were held, slashed open the cage with his sword, and released everyone inside.
Entrusting the task of comforting the people to Gandalf, Luke went off alone to search for the Trolls' treasure hoard.
He continued deeper into the cave and soon found its end.
The end of the cave was piled high with gold, silver, and jewels, which shone exceptionally brightly under the glow of the fireflies, and their quantity was several times that of the treasures from the previous five Troll caves!
But just as Luke was astonished by such a large amount of treasure, he accidentally discovered a black object emanating magical fluctuations buried among the gold coins within the treasure.
Luke's curiosity was piqued.
He walked over and used his magic wand to brush aside the gold coins on top.
When it was fully revealed, he found it was a black crystal ball the size of a head.
He leaned closer for a careful look; it seemed to be a spherical object polished from an entire black crystal, and inside, a faint, shimmering mist constantly surged, displaying various blurry images.
"What is this?" Luke carefully touched it with his magic wand, and after finding no reaction, he dared to touch it with his hand.
As soon as he touched it, the black crystal ball instantly reacted, emitting light, and the misty light inside transformed into a clear image.
The scene displayed in the image was none other than Gandalf comforting the villagers on the other side of the cave.
Gandalf, as if sensing something, roared into the void, "Who's there?"
Luke was startled, looking at Gandalf's eyes, which seemed to be looking back at him through the crystal ball from across space, and then quickly shouted towards the outside of the cave, "Gandalf, come over here!"
Hearing Luke's shout, Gandalf came in Luke's direction, and Gandalf's figure was also dynamically displayed on the crystal ball.
"What happened?" As footsteps approached, Gandalf walked into the treasure cave.
Luke showed the black crystal ball to Gandalf, "Gandalf, can you tell me what this is?"
Seeing the black crystal ball held in Luke's hands, Gandalf was very surprised and blurted out, "A Palantír!"
Then he realized, "I was wondering why I felt like I was being watched just now, so it was the Palantír in your hand!"
"You are truly lucky to have found a Palantír; this is a treasure everyone dreams of!"
Gandalf couldn't help but feel a pang of envy.
"Gandalf, you said this is a Palantír?"
"Absolutely right," Gandalf said with certainty, "I have seen other Palantír before, and apart from the difference in size, it is no different from the others."
Although Luke had already suspected it, he couldn't help but feel a surge of joy upon hearing Gandalf confirm that it was a Palantír.
The Palantír is a divine artifact that allows the user to see events that happened long ago or in distant places.
Those with strong will and powerful minds can even direct their gaze to anywhere they wish to see.
It can be said that with a Palantír, he would be equivalent to having clairvoyance, able to win battles from a thousand miles away.
He could even use it to see ancient events and explore ancient mysteries.
However, Gandalf immediately warned Luke, "Luke, you must use this Palantír cautiously, especially do not try to contact other Palantír with it, because you simply do not know who else might be using other missing Palantír."
"I understand, thank you for the reminder, I will use it carefully." Luke nodded earnestly.
As far as he knew, the Demon King Sauron and the White Wizard Saruman both had a Palantír in their hands, and Saruman was controlled by Sauron through the use of the Palantír, thus falling and choosing to betray the side of justice.
Even Saruman could be influenced and corrupted by Sauron through the Palantír; he naturally would not be so overconfident as to try and contact other Palantír.
Having obtained such a treasure as the Palantír, which even Gandalf envied, Luke was extremely happy; even the large pile of treasures in the cave failed to excite him in the slightest.
Gandalf had already comforted the villagers who had been imprisoned and kept by the Trolls outside, rekindling their hope and courage.
The two then, as before, distributed a portion of the money to these villagers, allowing them to take the money and leave the area, either by boat south to the southern human kingdoms, or west towards Luke's Weathertop or further west to Bree.
Luke then once again summoned a snake that knew the way, allowing the fearful villagers to follow the snake out of the forest.