Finally! The practical part of the lesson!

Without thinking about anything else, Helena stood up and walked over to the back part of the... classroom, ship, or whatever it was, and took everything she needed, so she wouldn't have to walk around all the time. When she was finally back at her seat, she took another glimpse of the instructions on the blackboard.

She remembered that professor Bentley said that they could use a silver knife, but since Helena... had two left hands, she decided to use Diffindo. Besides, she was good at charms.

The girl pointed her wand at the coral at about twenty centimeters and said "Diffindo." First step done.