Just as Moody dodged the explosion, Vizet retreated swiftly as well, and in the place where he had originally stood, the air was also exploding, producing one hollow blast after another.
Both of them vanished at the same time once more. The trees destroyed by the explosions turned back into books and continued burning in the flames of the Fire-Making Spell, sending up wisps of black smoke.
Taking advantage of the Small Forest falling silent again, the students finally had a chance to ask questions.
"Professor McGonagall, did Professor Moody also... integrate some kind of magic into the Obstacle Curse?" They connected the two explosions. "Can the Obstacle Curse be cast in this way too?"
"Of course it can!" Professor McGonagall kept an eye on the movements of the two people in the Small Forest and began answering the students' questions.
"They both used the Obstacle Curse. When this spell is cast on an opponent, it can briefly restrict the opponent's movements, correct?"
"Right!" Anthony Goldstein answered from the side. "Professor Moody also said that you don't have to use the Obstacle Curse directly on the enemy. You can create obstacles around the enemy instead, hindering their movements."
"By that point, doesn't it resemble Transfiguration somewhat?" Professor McGonagall asked in return. "Transforming a spell into an invisible obstacle, thereby restricting the opponent's movements."
"The reason this can be done is that the Obstacle Curse has been improved by countless people. Its original effect was very simple: to 'shackle the enemy's feet (impediment).'"
"The key lies in the 'shackles,' so its original form was a Transfiguration spell. After the improvements, the Obstacle Curse not only gained a dedicated incantation, but also changed from tangible to intangible."
"The benefit of doing this is that the effect of the Obstacle Curse is more