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Meryl and Alodi gathered the Forge of the Guardian and brought it to the Hall of the Guardian.
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With the aid of a mage adventurer and the spirit of his old student Alodi, Meryl fought Kathra'natir off, but Kathra'natir escaped into the Twisting Nether before he could be killed. ĭespite Meryl's best efforts to subdue Kathra'natir, the dreadlord managed to break free and attacked the Violet Hold in Dalaran. Recognizing that his demonic possession was a liability to those around him, he declined membership in the New Council of Tirisfal and left in self-imposed exile, renaming himself Meryl Felstorm as a sign of his corruption. Having lost control, the demon was able to slay the blood elf Dalynnia Wrathscar and drain her of her power before Meryl got him back under control. Though he tried to contain Kathra'natir, his will eventually faltered during the New Council of Tirisfal's offensive on Cho'gall and his Twilight's Hammer Cult.
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In order to lure the demon away from Valeera's body, he challeged the demon to possess his body instead and being the stronger of the two wills managed to repress the demon in his body.
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When they reached a secure location, Meryl discovered that the demon that had possessed Valeera was none other than Kathra'natir, a demon whom he and the original Council of Tirisfal banished centuries ago. This allowed Meryl enough time to recover and teleport them to safety. Valeera tried to fend off Cho'gall while Med'an tried to revive Meryl but Cho'gall was too strong and growing more desperate, Valeera offered herself willingly to the demon within her body in order to obtain the power to fend off Cho'gall. They managed to save Med'an but before they were able to leave, they were intercepted by Cho'gall who had knocked Meryl out with his incredible power. After fighting off the Scourge, he discovered that Med'an's father was Medivh, and along with Valeera Sanguinar he traveled to Ahn'Qiraj, where Med'an was held as a prisoner. When Meryl discovered it, he quickly flew after him, arriving in Theramore just in time to warn the island of an approaching Scourge Necropolis. Years later, when Med'an witnessed his mother being kidnapped by the Twilight's Hammer, he chased after her. In anguish over killing Llane, Garona also asked Meryl to hide away her daggers, Anguish and Sorrow, in hopes they'd never have to be used again. Garona asked him to take care of her son, Med'an.
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