Ron's voice began to tremble despite himself. "Why is it... this color?"
"Do you need me to describe it for this blind man?" Professor Snape raised an eyebrow. "It should be a soft pale blue, and it should give off a faint fragrance."
"Now, would this blind man please tell me..." He took a step closer, mockery seeping through his icy tone. "Why has it turned into this?"
At the sound of Snape's cold voice, Hermione and Harry almost simultaneously stopped what they were doing and looked up toward the platform in concern.
Whether it was because standing beside the cauldron was too hot, or because of nerves or something else, Ron only felt sweat continually beading on his forehead.
Staring at the potion in the cauldron, which had taken on a strange greenish color, he merely opened his mouth, but his throat seemed blocked, and he could not say a word.
"Five points from Gryffindor!" Snape announced. "Because I added twice the amount of White Lilac Petals. If you continue to stand there in a daze and only add the White Lilac Petals now, the same thing will happen."
He raised his wand and waved it at the blackboard, and another line of writing appeared on it.
With the blackboard's banging sounds serving as a reminder, he said to the students in the classroom, "Copy down what I've just added! From now on, whenever there is new content, write all of it down!"
Hearing Snape say this, Ron and Harry realized something at the same time and, as if by prior agreement, cursed under their breath. "Oh! Damn it!"
Clearly, Snape's questioning was only the beginning.
As for how many more points would be deducted...
Harry and Ron had already... or rather, had no choice but to deliberately stop