'But we have another year to go before that happy moment of farewell,' said Snape softly, 'so, whether or not you are intending to attempt NEWT, I advise all of you to concentrate your efforts upon maintaining the high pass level I have come to expect from my OWL students.

'Today we will be mixing a potion that often comes up at Ordinary Wizarding Level: the Draught of Peace, a potion to calm anxiety and soothe agitation. Be warned: if you are too heavy-handed with the ingredients you will put the drinker into a heavy and sometimes irreversible sleep, so you will need to pay close attention to what you are doing.

Chapter 12