Black Magic
Sorcery
noun, の adjective
The devil art is black magic and sorcery. The kind of things that devils do.
まじゅつ
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
「好き嫌いしないの！黒魔術だけじゃなくて白魔術もちゃんと勉強しなさい！」「はいはい。いつも同じこと言ってるよね。」「"はい"は一回でしょ！」
"Don’t be so picky! You shouldn’t just study black magic, but white magic too!" "Yeah, yeah. You always say that." "One yeah is enough!"