Dear Dark Lord
I must say that the spell you cast was quite an efficient one. The students have become so distressed that several have taken their own lives- in fact, the insurmountable Harry Potter, the indisputable Hermione Granger, the irrepressible Ronald Weasley and the supposedly-immortal Albus Dumbledore have fallen prey to this, the most sneaky of spells.
Despair is such a powerful feeling. It was exceedingly clever of you to think of it. All congratulations on winning this war, Dark Lord.