After several failed attemps at transforming her rock, Arkee started shaking her wand, as if it were malfunctioning and a good shake would set it right again.

"Variegatus... variegatus... variegatus..." she repeated quietly while still shaking her wand, "variegatus - whoops!" A thin stream of violet shot out and hit an unsuspecting ink bottle, which cracked open like an egg, spilling the dark contents.

Arkee tried to look innocent, hoping that the student who owned the bottle would take pity on her.