Excited at the prospect of being a Viking, and hoping Professor Christiansen wouldn't give her a beard, and also really hoping she'd earn Ravenclaw some points, Ariana frantically searched her memory for any runes she could think of from last year. She thought, and thought, and suddenly DING! Her hand shot into the air and she blurted the first rune she could think of. It just happened to be a number.

"Um, isn't an Acromantula used for the number eight because of its eight eyes? Oh, and no beard please!" she added hastily.