The League of E.V.I.L. is a group of villains formed by Rafaam. Each of its members have their own nefarious goals.
Founder member of the League of E.V.I.L.. His goals are unknown to the other members, one thing they know is that it involves the magical city of Dalaran. Rafaam has a variety of demons at his command.
Hagatha vowed revenge against Gilneans and adventurers who assisted them. She joined Rafaam for getting her revenge from the ones who defeated her. She commands drustvar horrors and murlocs at the invasion of Dalaran.
Not much is known about Madame Lazul. One thing that is known that all of the members of League of E.V.I.L. are summoned at her cart by Rafaam. She joined Rafaam and her forces of faceless ones, qiraji and Hench-Clan quilboars.
Heist of Dalaran
The League of E.V.I.L defeated the citizens and also the mighty members of the Kirin Tor (who have been guarding Dalaran the whole time) and succeeded in bringing the entirety of Dalaran under their kleptomaniac grasp.
Siege of Uldum
After seizing Dalaran, the League of E.V.I.L. attacked Uldum, unleashing a plethora of plagues upon its denizens. There, they ran into the League of Explorers, Rafaam's archenemies, who stepped up to defend the desert and its treasures from him and his preposterous malcontents.
Even though the League of Explorers were able to neutralize the threat and take down Tekahn, the League of E.V.I.L. managed to obtain what they had come for: the Plague of Undeath.
Battle for Dragonblight
With the Plague of Undeath in hand, Rafaam set sail for Northrend, where he aimed to resurrect Galakrond with the Plague of Undeath and use him to wreak havoc upon Azeroth.
Once again, he was intercepted by the League of Explorers, and the two groups engaged in a final showdown in the skies above Dragonblight.