Ravenous Leucrocota

A defensive body with an offensive button, built so the front half does its job from the moment it lands and the back half waits for the late game when the mana stops mattering. The 2/4 with vigilance is a wall that doesn't have to choose between blocking and pressing the board; the monstrosity activation costs more than the creature did to cast, which is the point. It's a mana sink for the turns after curve-out, somewhere to dump the excess lands that would otherwise be dead cards on top of the deck. Pay seven and the wall becomes a 5/7 that still attacks and blocks on the same turn, a real threat rather than a speed bump. Monstrosity as a keyword was a green answer to the flooding problem: give the board a creature that scales without needing a second card, so drawing your tenth land becomes a build-up toward a finisher. Leucrocota is one of the plainer expressions of that idea, no enters-the-battlefield trigger, no payoff for going monstrous beyond the raw stats, just a body that grows once and stays grown. It asks for patience and a steady land count, and rewards both with a creature that holds the ground early and ends games late.