During Med'an's rescue at Ahn'Qiraj, he managed to get free and get control of Valeera to fight Cho'Gall. Later, when Meryl teleported them out, he tried to possess Med'an, but Meryl Winterstorm offered himself in his place, taunting him about his abilities. The demon fell to the "trap" and possessed Meryl instead, becoming contained once again.
Since then, the dreadlord has been inside Meryl, forced to do his bidding, and sometimes helping him with his own abilities. Eventually, Meryl thought the influence of the demon too much for his relationship with the New Council of Tirisfal, so he left.
Relationship with Onyxia
He may have something to do with Katrana Prestor because Vendellin, who cast his mark, was hired by her and because the name "Kathra'Natir" looks like another form of expressing the name "Katrana" (Kathra'Natir).
- "I am not her demon. She is my vessel! She offered herself to me willingly! And this is no child's game!"
- "Meryl Winterstorm! It's been a long time since we met!"
- "Powerful though you are, mage, you are no guardian! You have not the power to command me!"
- "I hear it too, boy, but the voice is only an echo of the past! It promises death... while I offer you life... and powers beyond redemption! Surrender to me and become greater than the gods themselves! Come! Embrace me. And be mine!"
- "You offer me a place inside you... thinking yourself powerful enough to control me? I am a dreadlord!"
- "If it is a battle of wills you want, mage... we shall see whose power is greater!"