The pandemic inspired a surge in the buying and selling of all manner of collectibles, from the traditional fine art, rare coins and currency to newer crazes such as Pokemon cards and street art
Having text like that on a card is both trinket text (like we see on Daretti, Scrap Savant) and begs the question what else the card can do like tribal support card that supports a creature type that isnt in the cube
Like most Magic: The Gathering cards, the value of Forest depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Final Fantasy)
Push your opponent's monsters backwards and march towards victory
But between activated abilities, mechanical flood insurance like adventures, and the fact that 1-drops are fairly uncommon, I think it averages out such that this is an okay benchmark