They were competing for points, eh? Ella smiled a little and immediately began to wrack her brain for all the spells she knew that might be used in duels. There were a lot she'd read about so she should be able to help Hufflepuff.

Raising her hand, the blonde bounced a little and waited to be called on. "Professor, the full body bind curse, or erm body freezing spell, might be used during a duel." Yup, cause ensuring your opponent couldn't move was definitely in your best interest.