if you use a love spell on a person, and you two fall deeply in love and you both realese a lot of positive energy, than could the spell be broken or even reversed. isnt a spell that bends the will of another black magic? and what if they loved eachother without the spell, than could the spell still make them hate eachother. and what if you used a powerfull love spell than used a truth spell. would the truth spell have to be more powerfull than the love spell to obtain the truth. and if the truth spell makes them say or do anything, isnt that black magic too?
post script: please do not attack my labeling of black magic, i know the theroy that there is no black or white, simply different shades of gray. but only 49 ;P