Until they started shrieking again, Nikita's ears had forgotten the painful sound of Mermish. Trying to cast spells and cover her ears was impossible.

Some of the students seemed to be able to translate this. Now that was a feat she hoped never to accomplish. The amount of time it would take listening to ear-splitting screeches simply was not worth it.

"Expelliarmus!" she shouted, free hand clapped over an ear.