I'm just curious as to how they are different. Dantalian clearly married an unwilling Prue to Zile which further turned Piper, Phoebe and the Book evil. My question is why didn't the same effect occur when Phoebe willingly married Cole in a Dark Wedding. The only difference I see is Prue was unwilling to marry Zile but knew the ceremony was evil, well Phoebe willing married Cole but didn't know the ceremony was evil. How could a Dark Priest not be able to infect the family's magic the same way a Dark Priestess can?