Josh nodded at the professor holding his breath not to insult him with his fury. So, cursing under breath, he held his parchment and took out his wand poking the poisoned piece. ''Specialik Revelio!''. Nothing happened. He fought the urge to tear the parchment into little pieces hard ''Specialo Revelio, Special Revilo no no no darn!'' 'Control yourself, control yourself. Take a huuge breath'. Of course if it was not possible to inhale fresh air in a stinky dungeon but he thought it could help. 'Now' ''Specialisss Reveliooo!''. Finally something appeared on his parchment.

'Moonstone'

Good, good. He could remember adding the stupid moonstone in his potion right after those fluxweed. It did a weird 'thud' in the bottom of his cauldron. But still for some reason he was hesitating to drink it. Somethnig from deep inside him was ordering not to do it.