The fact that Jinnie Fay can occupy a mono-green, Gruul, Selesnya, or even Naya slot also makes it easier to fit into a Cube than a lot of other three drops
It's hard to stop, and the number of cards that exist that can feasibly answer it are few
To be honest, this creature feels like less of a flavor win than most of the others, but the drop is still pretty good, with some staples like Primal Vigor and Heroic Intervention
It lacks the utility of Terra or Kenrith, but it offers a ton of raw aggression in exchange
Being able to stop a Stoneforge Mystic from ever hitting the board even when on the draw can be a big deal in Modern too
It also partners with Alisaie Leveilleur, who makes the second spell you cast cheaper, so it should be very interesting and easy to do these small combos