There are many scary legends in Hogwarts...
For example, the Professor's Curse in Defense Against the Dark Arts!
For example, the Curse of the Crucible in Potions!
For the former, we all know that no DADA professor can attend the opening ceremony twice.
The so-called Crucible Curse means that every seven years, a Crucible Killer will appear in Hogwarts.
For example, Gilderoy Lockhart who enrolled in 1970, Quirinus Quirrell who enrolled in 1977, Nymphadora Tonks who enrolled in 1984, and Neville Longbottom who enrolled in 1991...
In response, a potion professor who did not want to be named said: I am really fed up! 10 Points from Gryffindor!
There is age fine-tuning, OOC is available, and it is easy to adjust.
Don't you think the Crucible Killer and the Potions Master are a good match?
Intention: Fear is also a deep emotion.