As Baba-Yaga kept telling the clueless trio about Nekxis' plans on Earth, she explained that she had been hunting the leaders for hundreds of years.
When the polar shift happened and restarted life on Earth, her time machine sent her to the beginning of the 17th century, and it took the witch a long time to come to terms with the fact that humans had lost the ability to perceive magic.
Not even a decade later, she heard rumors of a couple of "witches" who had destroyed a village in Europe, and hoping that she could meet other Atlanteans, Yaga decided to look for them.
However, after years of searching, she was disappointed when she realized they were mages from Terra, who had somehow crossed through the convergence into their world.
At first, the mages wanted to recruit Yaga into their group, and considering that they were still early in their preparations, they spared no details when telling her about their plans.
Nonetheless, Yaga wasn't interested in ruling the world.