On its own, it doesn't advance the board state or win the game outright
Creature - Kavu Phyrexian Elturel Survivors Trample, myriad (Whenever this creature attacks, for each opponent other than defending player, you may create a token copy that's tapped and attacking that player or a planeswalker they control
While the set-up for the turtle may be appropriately slow, the payoff is explosive, and it could find a home in Modern quite easily
It began development as a set exploring the underground civilization genre, and later adopted the plane of Ixalan as a backdrop
While it has a demanding casting cost, the effect you get when you play this Battle is basically MTG Cascade with a value of four
Water web, oil slick, whatever