Harry Potter and the Prisoner of Azkaban

Harry could see after Hermione cast a spell.

Hermione’s spell had done the trick. Harry was still numb with cold, still wetter than he’d ever been in his life, but he could see. Full of fresh determination, he urged his broom through the turbulent air, staring in every direction for the Snitch, avoiding a Bludger, ducking beneath Diggory, who was streaking in the opposite direction…