Pixies cut out and multiplied, she charmed them to flutter about, setting a boundary around the round platform. It's purpose obviously to keep said pixies inside. Now it was time to charm the dragons! This was the excited bit. The game was almost done and she'd be able to give a go.
Concentrating and tapping each dragon with her wand, the Slytherin watched them twitch to life. She loved charms, she really does. They were so useful. That done now, she took a large parchment sheet and wrote down what her game basically was...