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It only sees play in one major deck, but it is the defining card of the archetype and what makes it work

Roiling Regrowth is one of several mana ramp effects in green/white midrange, sacrificing a land to get two more and put them right into the battlefield (meaning you get mana ramp and double Landfall in one go)

Momentous Fall, these cards do functionally the same thing and have their pros and cons

Availability is the bigger practical split

A 2B costed Instant, it gets target creature -0/-9999 until end of turn, killing almost any creature you can find in Magic: The Gathering that has been the beneficiary of an infinite, or near-infinite combo