"Not a trace of impurities?" David Morris seemed to realize something, and his tone grew urgent. "Mr. Lovegood, do you mean... ultrapure water?"
"Could its resistivity possibly reach..." He paused, seemingly searching for a way Wizards would understand. "Simply put, the water you conjured this time contains no impurities whatsoever."
"The impurities I mean include bacteria, viruses, all manner of organic matter, minerals, and even other trace elements..."
He shrugged, as though he still felt his explanation was inadequate, his tone gaining a touch of helplessness. "In short, the water you conjured is extremely pure. Is that right?"
Wizet nodded. "Yes. At least, that was what I had in mind when I cast the spell."
David Morris's expression turned serious. "Mr. Lovegood, is this something only you can do, or..."
His gaze fell on the examinees, who were frowning and wiping away sweat as they struggled to cast Transfiguration. "Can all Wizards achieve this effect by casting this spell?"
"It's impossible for everyone to achieve this effect." Wizet shook his head. "You need to master certain techniques to do it."
"You need to understand Aguamenti to a certain extent before you can summon the water you need according to your own will."
"The name of this spell is Aguamenti?" David Morris frowned. "I think I've heard of this spell before..."
He thought for a moment before saying, "From what they told me, Aguamenti seems to be quite commonly used, but they never told me... that this spell could achieve something like this."
Wizet explained, "We usually do not need water that pure. Ordinary water, or cleaner water, is enough for our purposes."
"As for water with special effects, it is mainly used in Potions and alchemy—for instance, pool water bathed in full-moon light, or dew collected in the morning."
"From