AU. Idea from NatsuHaremFan. Seven extremely powerful dark wizards sanctioned by the Magic Council in exchange for providing their services in times of dire need. Each has the freedom to do what they wish, as long as no innocents are harmed. They are the "Seven Warlocks of Ishgar", and Natsu Dragneel is the strongest of them. VeryPowerful!Older!Natsu x Collective (Harem)