If her own pride had not interfered, Holly might have called foul at the prospect of being paired with an OWL-level student. A year apart in age was less detrimental when the subject matter was similar, but there was a considerable difference between intro-level defensive studies and OWL-level defensive material. Holly had fortunately been blessed with tutors such as Seneca Lestrange and other older students from the moment her Hogwarts education began - perhaps that's why the staff though to pair her with the Weasley girl.
As the rules were being read, Holly deduced that the only was to defeat an OWL-level student was to use OWL-level spells; and although her formal Hogwarts education had never covered more advanced spells, Holly was the sort who sought to advance her knowledge at every possible opportunity. Thus, when given the go-ahead, Holly raised her wand and attempted to make Miss Weasley vomit slugs.
As the rules were being read, Holly deduced that the only was to defeat an OWL-level student was to use OWL-level spells; and although her formal Hogwarts education had never covered more advanced spells, Holly was the sort who sought to advance her knowledge at every possible opportunity. Thus, when given the go-ahead, Holly raised her wand and attempted to make Miss Weasley vomit slugs.

— set by MJ <3 —