Vivien, Nature's Avenger

The distinguishing move here is what the +1 does: three counters at once, on any creature, for the modest cost of ticking up. That is not the incremental, protect-the-walker plus that green planeswalkers usually carry; it is a burst of stats that turns a mana dork or a leftover token into a genuine clock in a single activation, and it climbs loyalty while doing it. The card is built as an engine of raw material rather than card advantage in the abstract: the minus one digs specifically for a creature and puts it in hand, so a green deck that wants bodies never runs dry, and the plus turns whichever body it finds into something oversized. The ultimate is the honest tell of the design's intent, a plus-ten-and-trample finisher that wants a board it can point at rather than a game state it can control. Its counter abilities presume a battlefield already populated, which is the tax on a six-mana walker with numbers this large: it does nothing meaningful in a deck that cannot present a target for the counters. Among green's several Vivien printings, each has pushed a different lever on the creature-matters theme; this one commits hardest to going wide-into-tall, using a counter package where others reached for direct removal or ramp.