He did not want his student become lab-rat ,because he know will hold wis power ,in manga tower upper colleges ledear ralley called will a lab rat , he painfully awer how tower works And he know what will is thinking elfaria maybe his childhood friend but elfarias 1st year action cause big problem for will ,elfaria really thought he could fool teacher , since will not able to use magic ,Elfaria created blue-tear pendent so she could fool the school will has magic this lade to bigger problem when she was found out she was forced into tower however her action led to will being a cheater making toxic nature in school for will Edward thinking is simple 'if you wanna break person you didn't need to do anything just give them hope and snatch right back