Wolfcaller's Howl

Built as a punitive upkeep engine for the multiplayer table, this rewards stinginess: it pays you a 2/2 Wolf for every opponent hoarding four or more cards, and the spigot slows the moment they spend down to three. That trigger condition is the whole strategic axis. Against a single opponent it barely functions, since one player can dump their hand and cut off the supply; across a crowded pod, an opening upkeep can mint several Wolves and a midgame swing can flood the board. The design encodes a behavioral nudge that few cards bother with: it doesn't just reward full hands across the table, it actively discourages opponents from sandbagging answers, turning a backlog of held-up removal into a token army aimed back at the player clutching it. Green rarely gets a card-advantage lever, and this isn't one in the conventional sense; it converts the information of who is loaded and who is empty into bodies, sidestepping the color's draw-step weakness by making opponents' restraint the resource. Paying four mana for an enchantment that sits idle on entry is the tariff on an upkeep engine that can run away with a game, and the trigger's dependence on opponents' choices is what makes the payout swing turn to turn rather than tick along at a flat, predictable rate.