Elves floods the board with small green creatures like Llanowar Elves, Fyndhorn Elves, and token Insects, so Glistening Deluge is excellent, giving every creature -1/-1 (and an extra -2/-2 to their green creatures specifically) which wipes their entire mana base of dorks and most of their board in one card. Extra Fatal Push cleans up any surviving one- or two-mana-value creatures cheaply. Mockingbird is weak here since copying their small dorks or utility creatures rarely matters when we need to be killing their board, not growing it. Wail of the Forgotten's slow incremental value can't keep pace with their explosive Gaea's Cradle-fueled starts.