Maiev, like every other Warcraft III hero that isn't currently implemented in Heroes of the Storm, was a long time coming. The warden that once bested Illidan is back, and she's bringing her famous knives and fancy footwork along with her.
Like the vast majority of combatants added since the launch of Johanna in the full release, she's worth picking up.
via destructoid https://www.destructoid.com/maiev-is-one-of-the-most-intricate-characters-that-s-arrived-in-heroes-of-the-storm-to-date-485104.phtml