Ride the Shoopuf
Two mana buys a persistent counter engine with no upkeep and no board presence to protect: every land you drop routes a +1/+1 counter onto a creature you target, so the accumulation tracks your land count, not how much mana you keep open. The enchantment type is the whole point of the front half. It sits under sorcery-speed removal aimed at creatures, dodges the sweepers that clear your board, and keeps ticking counters through the turns a green deck spends developing lands anyway. What separates it from a plain landfall trigger is the escape hatch: a heavy seven-mana investment turns it into a 7/7 Beast, converting accumulated advantage into a clock only after the counter engine has done its slow work. That price does the balancing. The animation is deliberately expensive so the card cannot be both a cheap enabler and a cheap threat in the same breath; you pay early for the counters, then pay again, much later, to close. This is a design built for decks that treat land drops as resources rather than curve-fillers: fetch effects, extra-land-per-turn effects, and anything that reuses lands from the graveyard all read as extra counters here. The counter placement also plays well with creatures that already care about being over a threshold, letting a single accumulating target become a repeatable line rather than a one-time buff.
