Speaking of which, it was not easy for Durmstrang to lend the Change to Hogwarts, after all, for Durmstrang House, the magical ghost ship was arguably one of the most valuable things in their school.

The Transform's preciousness lies in the fact that it is like a Hogwarts castle, with a lot of powerful and long-lasting magic attached to it. If I have to say it, it's like a movable sea fortress.

In fact, perhaps the most amazing thing about the Transformation is its magic that allows it to move back and forth between the world's many waters. Not only seawater, but also freshwater such as lakes and rivers can be moved as long as they can accommodate it.

However, it would certainly take some time to activate the magic of such a large ship, and it was obviously impossible to use it indefinitely.

Of course, the most important thing at the moment is that such a large amount of magic will inevitably set off a huge tide of magic - although ordinary wizards cannot directly feel the existence of magic, and may not even know the concept of "magic", its impact is real. Even through some means of alchemy or potions, some of its phenomena can be detected to some extent.

"It can't be transferred yet!"

Hearing Sprout's proposal, Snape, who had just returned to the hatch, stopped him:

"There's a good chance that will alarm the big guy - and if the Change gets any disruption during the transfer, the consequences are even more unimaginable."

"Yes," McGonagall nodded, "until we find out what it is, we can only calm down and wait for the time being." ”

At this point, she turned to Snape again:

"You just said, do you feel some will watching us? Is there still one now? ”

"Well, it's still there." Although he knew that no one else could see in the fog, Snape habitually nodded slightly, "I don't know where its main body is—in short, there is a will that is lingering in the fog, and it hangs over us all the time...... I'm not sure exactly what it's trying to do. ”

"Is that the 'big guy' you just saw?" Flitwick asked sharply.

Snape hesitated for a moment when he heard him ask, and then shook his head:

"I can't be sure, but ...... The odds should be not small. ”

The voice fell slightly, and the four seemed to be thinking about what to do next. Soon, however, McGonagall seemed to have something in mind, and turned to Sprout:

"Pomona, can you get some marine plants in the waters around the boat to go out and explore? The kind that is as close as possible to the enemy to discover. ”

"Don't let anyone find out?"

Sprout thought about it carefully, and after a while, he nodded and said:

"That's algae...... However, due to the primitive nature of their life forms, it is unlikely that they will actively control them...... I'll give it a try! ”

Marine plants are also plants, and Sprout, as an expert in this area, naturally has dabbled in research. It's just that since this has basically not been the mainstream direction of herbalistic research since ancient times, she is obviously not good at it.

And when she rummaged through her pockets and found a small dark green glass bottle, the other three followed her to the side near the side of the ship's side railing.

"It's a planktonic algae called 'Hurricane Algae', which I bought from a traveling merchant at a wizarding night market on the Mediterranean Sea when I was traveling to Italy. They are usually pure and transparent, and only after they have gathered and multiplied a lot and absorbed enough seawater will they turn bright green when they collide with each other, and then form a hurricane at sea...... Fish-people usually use them to create air bubbles underwater. ”

She explained casually, and at the same time, she directly stirred the vial with her tail finger, which seemed to take a long time.

“…… Oh, and by the way, it's said that the Bubble Head Charm was inspired by these little things. ”

With that, she finally pulled out her finger and shook it, then took out another vial and dripped a drop of some solution into it. Then, she threw the small glass bottle containing the hurricane algae directly off the boat.

"Actually," Sprout concluded, "if there really is a large magical creature of the sea around the Change, then after their self-reproduction, they may soon form a hurricane due to the very strong turbulence of the sea, and we can tell by the wind and the color of the water...... And because the algae are so tiny, now that the fog is so big, there's a good chance they'll spread even in the fog. ”

As soon as they finished speaking, the other three felt Sprout pat their bodies individually, and then handed over the masks of the three and a half faces.

"Be careful not to inhale into your lungs."

"Sounds dangerous."

Flitwick muttered a shrill voice, and then hurriedly put on his mask - if he inhaled too much in one moment, maybe his lungs would blow up in two steps?

And it was during the busy work of Sprout that Snape suddenly turned his head sideways, and then frowned slightly.

"Professor McGonagall, it seems like a naughty imp again...... I mean, some students ran out. ”

"Huh?"

McGonagall, who was thinking while wearing a mask, listened carefully, and sure enough, she heard a faint sound of footsteps coming from inside through the hatch.

"I'll take a look!" Flitwick waved his hand, "Keep watching, and remember to be careful—there's no guarantee that this won't be another trick up the wheel of that Helmo." ”

With that, he opened the hatch and walked in, and Snape heard the sound of the door closing, and immediately stepped forward and resealed it with a spell.

"You can't let the fog in too much." He explained casually.

That's right, whether it's from the point of view of the will to peep in the fog, or from the point of view of Sprout's hurricane algae, the decision to close the door could not be more correct.

"Wait."

Suddenly, McGonagall, who had just been reminded by Snape to listen carefully, seemed to hear something else, and said with her eyes slightly closed:

"You ...... Did you hear anything else? ”

"The sound of those students?" Snape pouted.

"No, it's not inside the boat, it's outside." McGonagall listened attentively, paused slightly, and then added, "Like...... Is there something buzzing underwater...... Pomona, is it one of those seaweeds of yours? ”

"I'm not sure," Sprout said hesitantly, "but if they make some bubbles in the water, I think they'll make some noise." ”

However, McGonagall's face did not show the slightest relief at this answer.

"It doesn't seem like a bubble."