Verdant Field

Tying a repeatable pump ability to a land rather than a creature is the whole idea here, and it tells you exactly which problem the design was trying to solve. A creature with ": pump" is just another body to kill; route the engine through a land and the ability survives every sweeper that clears the board, because nobody is wrathing your basics. The cost is paid in tempo and in a different sort of fragility: three mana sunk into an Aura with no immediate effect, attached to a permanent that taps for the pump (so it cannot also produce mana that turn), and exposed to enchantment removal and land destruction alike. The exchange front-loads a brittle investment in hope of a long, grindy game where one land quietly turns each of your attackers into a slightly bigger threat. That is a recognizably late-era-of-its-time reading of green: incremental, mana-hungry, asking you to commit early and cash out slowly rather than dictate the board. It sits alongside a handful of other lands-that-grant-abilities effects, and it is the least flashy of them, a value piece for a deck already planning to win on the ground that just wants the math tilting its way over five or six turns.