"How do I test this to find out if I'm the one destined for you?" Fred pondered, stroking his chin.
"Place your hand on that barrier and try channeling your magic into it," Agarth suggested, glancing at the two brothers.
George didn't doubt Agarth's words; after all, it was just a matter of inputting magic power, so he raised his hand and placed it on the magic barrier.
Fred and Agarth looked on expectantly, but there was no response. It seemed that the destined person was not George.
"I'll try!" Fred raised his hand and placed it on it, but there was still no reaction.
"Looks like none of these will work. Let's go look at something else." Agarth shook his head and went to another display case.
'I need to take a good look at how much the old man has lied to me all these years.'
Just then, he turned around and saw the familiar packet of black powder. Agarth reached out and touched it, sure enough, it was the waste itching powder.
"Itching powder, 3 knuts."
"This is it, three copper knuts. It's such a big bag, and it even comes with a small jar of antidote. Fred and I have been studying it for a long time, but we still can't figure out what it's made of."
As George spoke, he grabbed another bag, he and Fred were running low on supplies and needed to prepare.
Agarth curled his lips slightly. Relying on the twins' talent, if it were the original, the two of them might actually be able to figure it out. But with this knock-off, no matter how much they were given, they couldn't possibly figure it out.
"George, Fred, you said there was something even more effective, where is it?"
"Look, the second row over there." Fred pointed to the row with the most people.
"This, this is it, a small bottle of enhanced itching powder, plus two bottles of antidote, costs 1 Galleon and 5 Sickles." George pointed to a white jar on the bottom shelf.
"What about this one?" Agarth picked up a bottle and pointed to the second-to-last jar.
"Super strong version of itching powder, plus two bottles of antidote, 2 Galleons and 10 Sickles."
Agarth took another bottle and pointed to the one on the next shelf.
"Ultimate version of itching powder, plus two bottles of antidote, 4 Galleons and 3 Sickles."
"Very good, very good, very good," Agarth clenched his fist and grabbed another bottle.
"Let's go, let's meet Mrs. Weasley at the bookstore."
Agarth said this with a forced smile, then went to the counter to pay with the bottles in his hands.
Thinking of taking out Galleons from the ring, he suddenly remembered that his ring had been taken away, and he didn't have Galleons prepared in his bracelet.
"Is he... broke?" Fred followed behind Agarth, glancing at Agarth's stiff movements, and whispered in George's ear.
"Professor Dumbledore gave the money bag to Mom, have you forgotten?" George added fuel to the fire.
Agarth, with his exceptional hearing, heard everything clearly.
'Damn it. Is there anyone worse off than me?'
Agarth could only pull a necklace from his left wristband and wave it at the person standing behind the counter.
"Agarth doesn't have any money. You tell your master I'll take these," Agarth said with a sour face, turning around to take the items from the two brothers' hands and place them on the counter.
However, fearing that the two brothers behind him would see it, he only shook the necklace briefly before putting it away.
The shop owner knew the necklace very well, he had just met its owner yesterday. After looking at Agarth's appearance, he respectfully bowed and packed up what Agarth wanted.
The two brothers saw Agarth take the things and leave without paying, so they chased after him.
"Hey, Agarth, what did you just show him? And he didn't even charge you!" George took the thing Agarth threw into his arms.
"This!" Agarth pointed to the things they were holding. "I developed it, but they're too dark!"
Agarth found a bench and sat down.
Unpack and arrange the items you just bought one by one.
"This is the purest itching powder, the premium version." Agarth glanced at the color, then looked at the second bottle.
"This color is from the super-strong version, which is the sediment from wastewater that has been filtered three times."
"This is the enhanced version, the wastewater has been filtered twice."
"This is the black powder sold by the three Knuts in your arms. It was made by filtering out the pitch-black sediment once."
Agarth placed the black powder packet at the very end, following the order.
"So these are all products from the same production, only their potency is gradually decreasing. But when that old boss and I were working together, he only said that he would give me 10 knuts for every bottle sold."
As Agarth spoke, his voice began to tremble.
'How could I not be angry! I thought I had made a profit, but this wasn't just a profit, it was a huge windfall!'
Grindelwald and Vinda even teamed up to deceive him, that's outrageous!
At first, the twins didn't understand Agarth's trembling behavior, but after Agarth finished speaking, they looked at him in shock.
They felt both admiration for Agarth for developing medicine at such a young age and shock at the exorbitant profits from this itching powder.
"Ah, Agarth, so you made this?" George stammered.
"No, I provided the method."
"So you're saying they robbed you because...?"
Fred started to say, but George added the second half of the sentence, "Because they lied to you?"
Agarth opened his mouth.
'Should I talk about something so embarrassing?'
'Should I tell them that I was initially proud of this one-sickle-a-bottle formula, or should I tell them that I frantically researched and developed various powders for this one-sickle-a-bottle formula, which is why there's such a full display case?'
"Because the cost price is 3 knuts per bottle."
Agarth chose the reason that least made him seem foolish.
"What?" the two shouted.
"What did you say? Three Knuts?"
Agarth nodded.
"This is a rip-off! This is a rip-off!" George exclaimed, jumping up and down.
"Yes!" Agarth pursed his lips and nodded in agreement.
"Ouch!" The two brothers, who had been jumping up and down, suddenly felt a hard slap on the back of their heads and cried out in pain.
"George! Fred! I'm looking for your books! How dare you wander around with Agarth like that!"
Mrs. Weasley's shrill voice rang out behind the three of them.
George immediately reached out and patted Agarth on the shoulder, pointing to the bottles and jars on display.
Agarth understood immediately, and with a flick of his left hand, everything was stored inside the bracelet.
Fred used the act of turning around to block his mother's view and started arguing.
"Mom, we just wanted to show Agarth around since he's never been to Diagon Alley before."
"Yes, Mom, have you bought all the books? Are we going home now?"
"Yes, yes, you know, Ginny is home all by herself."
The two brothers coaxed Mrs. Weasley toward Leaky Cauldron Pub, one after the other, while Agarth smiled, shook his head, and followed.