Fun.
But what does envy have to do with life?
Life is an element of advancement and adaptation. Similar to how
's Mitosis and
's Fractal are biological/magical variants of mass creature production, Envy represents Life's ability to mimicry the opponent's board state. (Admittedly, Mimicry would've likely been a better name, but Envy has a certain flavorful ring to it.
Nothing to do with green here.)