7 Deities of Ishgar

Although many people may think of this organization, a legend, through and through it is factual. They could be used to scare little children and many other stuff. It's ultimate purpose was to balance the magical world. That, it did.

People
Although the group is consisted of only 7 people, they could destroy a typical guild within an instant. They used to be at 8 people, with Mystogan within their ranks, and the rest of the 7 were unknown. Those 7 were incredibly strong. And their leader, Ragnarok Eve, was beyond that. After Mystogan left, they created a last-minute way to communicate with him so they could keep Edolas in check as well as Earthland. Since Mystogan didn't ever want to be exposed by a guild member, the name still stayed 7, as he wasn't included in the title. People reported a character with a magic similar to Gildarts, was found destroying a dark guild entirely. Surely it was the work of The Deities, but nothing was found about Gildarts. Those Seven Gods are listed here

Ragnarok Eve
Ragnarok is a tall and slim young adult who had a dark thought about life as kid. Later he found the truth, and then he created a guild to begin his new way of his positive way of life.