Rubik’s Cube of Heavens

 The feeling of ups and downs came too quickly. They had passed so many ‘checkpoints’, they had such high expectations before, and now, they feel disappointed.

Coven knew that if it were for the normal storyline, there should be something in this final room, so when he saw that the room was empty, he understood that he had come too early.

Obviously, Dumbledore had not yet released the ‘Philosopher's Stone. So, it was naturally not here.

After making a guess, Coven simply stood at the door and did not move, while the twins explored everywhere, wanting to see if there were any traps here.

Unfortunately, ten minutes was enough for the twins to check every brick and crack in the wall, but they still found nothing.

"Sigh…" George stood up and sighed helplessly, "Is that all? Then what was the reason for our previous difficulties?"

Fred was also disappointed. He asked Coven, "Coven, what about you? Did you find anything?"

"No." Coven shook his head. "I guess we came early. Maybe Headmaster hasn't prepared the last thing for this test."

"Alright…" Fred accepted Coven's guess and stretched tiredly.

At this time, George had already returned to Coven's side. He turned around and looked at the entire room again. Then, he chuckled and said, "But it's not like we haven't gained anything. At least we have succeeded in tonight's adventure."

"That's right!" Fred also quickly changed his attitude. He smiled as he walked towards the door and said, "At least tonight has opened our eyes."

"Should we go back?" Coven asked the twins.

"Let's go, let's go. I'm a little sleepy." George turned around and said as he walked back.

Fred followed him and said with a smile, "It's time to go back to sleep. Tomorrow morning is Snape's Potion class. I don't want to be caught by him."

Coven smiled and shook his head slightly. Today's adventure was really a bit fierce.

He followed the twins and soon returned to Potion's room.

The twins turned to look at Coven, waiting for him to extinguish the purple flames on the other side.

Coven was about to step forward when he suddenly stopped. He turned to look at the Potion bottles, and an idea suddenly came to his mind.

Therefore, he immediately took out paper and pen from his pocket, which had cast the ‘Traceless Spell'. Then, he bent over and started writing on the wooden table.

"What are you writing?"

The twins asked in unison. They came over and poked their heads out to take a look, but because Coven was bending over to write, they did not see the content.

Hearing this, Coven continued to write and responded, "I can't come here for nothing. I also left a checkpoint here."

After the twins heard this, they looked at each other. Their smiles gradually became wicked.

Soon, Coven wrote the note, put away the pen, put the note on the table, and then picked up the note that indicated that Potion was right.

The twins couldn't help but be curious at this time. They immediately picked up the note that Coven left behind, and their heads gathered together to read the contents of the note.

?52-23 + 2 * 30 * 60 * 3 * 2N45 -3! -C(4, 2) =? ?

?and explain the method used to cross the flame.?

?warned! Warning! ?

?could only open the brick corresponding to the correct answer. If you opened any wrong brick, a powerful explosion would occur! ?

George, "…"

Fred, "…"

George and Fred were at a loss after reading the first line of text.

At the same time, they rubbed their eyes and looked at the note again. It was still a pile of messy things.

"What… is this?" George turned to Coven and asked.

At this time, Coven was carving numbers on the floor tiles in the room. When he heard this, he looked back at the two of them and smiled to cover up, "That is a math problem in the Muggle world. I accidentally wrote it down during the holidays when I made money."

The twins looked at each other again. Then, George felt as if the note in his hand was a dangerous item and immediately threw the note back on the table.

Seeing this, Coven simply called for the twins to help him and helped him use his wand to leave numbers on the floor tiles in the room.

Not long after, all thirty-floor tiles left a number mark on them, and then Coven used a spell to open the floor tiles marked with the number ?5?, and pressed the logical prompt note about Potion under the number 5 floor tiles.

He got up and clapped his hands to count it as complete.

Seeing this, Fred asked in confusion, "Didn't you say on the note that you were going to set up an explosion trap?"

"Haha! I'm not a devil." Coven laughed and said, "I was just casually mentioning it. It depends on whether our future explorers believe that nonsense."

George was stunned for a moment. He suddenly pointed at Coven and burst into laughter. "Hahahaha! You are the devil! Hahaha…"

Fred also imagined the scene that would happen here in the future, so he could not help but burst into laughter. Of course, he also rejoiced in the misfortune of others, feeling a little pity for those who came later.

Next, Coven once again extinguished the purple flames at the door, and then the three of them returned all the way.

However, after passing by the chess board room for a while, Coven used the < < REBIRTH spell to restore all the chess pieces to their original state and reset the positions of all the chess pieces.

In the key room, Coven once again added a powerful Locking Spell to the door lock, and in the room where Devil's Snare was in, Coven turned Devil's Snare into a rope ladder.

Finally, the three carefully lightened their movements to avoid waking Three-Headed Dog up. They successfully opened the door and left the test site arranged by Dumbledore.

After leaving the third floor, Coven did not return to Room of Requirement to rest. Instead, he returned to the dormitory with the twins and slept all night.

…….

The following days were very calm. Obviously, the professors had not discovered that someone had broken through the forbidden area on the third floor.

In the blink of an eye, two months had passed since the start of school, and it was the Halloween Festival on October 31st.

The food at the festival banquet was naturally much more sumptuous than usual, but it was a bit unfriendly to Coven because all the food was sweet.

Coven did not like sweets, to begin with, not to mention that the sweets in England were especially greasy.

Therefore, he could only choose a small portion of the food that was not too sweet at the banquet, planning to go to the kitchen after midnight to add a meal for himself.

However, not long after the banquet began, the wooden door of the auditorium was suddenly pushed open. This year, Professor Defense Against The Dark Arts ran in with a face full of horror.

A scene of déjàvu appeared. In the next moment, the memory in Coven's mind emerged…

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