YOU SAID:

i simply must curse upon you a spell like no other

INTO JAPANESE

私はあなたに他に類を見ない呪文を呪わなければなりません

BACK INTO ENGLISH

I shall curse you with a spell like no other

INTO JAPANESE

他に類を見ない呪文で君を呪う

BACK INTO ENGLISH

curse you with a spell like no other

INTO JAPANESE

他に類を見ない呪文であなたを呪う

BACK INTO ENGLISH

curse you with a spell like no other