The moment that cauldron appeared, several Slytherin students, including Gregory Goyle, instantly recalled their awful exam experience from back then, and their faces unconsciously paled.
It was not just those few Slytherin students; the students from the other houses also quickly understood what was going on and let out waves of suppressed laughter.
"Everyone can try to imagine this..." Vizet's voice rang out again, drawing the students' attention back, and the laughter soon vanished.
"In each of our hearts, there is a cauldron that is constantly brewing potions and can regulate itself."
"Since it is a cauldron for brewing potions, where are the ingredients for those potions? They are in our hearts. They are the various emotions we produce every moment."
"Joy, sorrow, focus, anger... every emotion is a unique Potion Ingredient."
"When you are happy, it is like adding celandine bright as sunlight; when you are focused, the cauldron gives off the scent of Valerian."
"In our hearts, this kind of potion brewing is taking place at every moment. The aura it produces will occasionally drift out as well, influencing the people around us and letting them feel our joy, our focus..."
As he spoke, the cauldron also began to change, spraying mist of various colors that coiled and intertwined in midair before silently fading away.
"Now, let us imagine such a situation: when you are walking on the Moving Staircase, but accidentally step on a trap in one of the steps..."
"That is undoubtedly a terrible situation, just like accidentally adding several Porcupine Quills to a Pimple Healing Potion that has not yet been taken off the flame—the reaction it triggers in an instant is enough to terrify anyone."
The cauldron boiled even more violently, even spitting out tiny sparks.
A surge of black mist suddenly rose from