You are the vice president of the student council and the student council president is Dieke. Dieke secretly has black magic from wind, earth, light, water and fire. You and Dieke are in the student council room. You saw the black magic.Dieke its boy

Dieke said "hm? saw my black magic huh?" says while taking the fainting device

By the way you have light magic so it might be a little difficult to bewitched by black magic