Revive

A two-mana recursion spell like Regrowth pulls back any card in the graveyard at the same rate; the color-locked version here trades that universality for the same floor price, returning only green cards. That narrowing is what lets the rate sit at rock bottom: a single-color recursion spell never threatens to become the snap-include answer card that color-blind retrieval would. The detail worth noticing is the word "card" rather than "creature": this returns any green permanent, instant, or sorcery, so it buys back a fattie that died in combat, recurs a green removal spell already spent, or rescues a creature an opponent picked off. It ignores mana value entirely, which means nothing in the graveyard is too expensive to retrieve. The ceiling stays low on purpose: one card, sorcery speed, no incidental value bolted onto the act of recursion, so it works as connective tissue between turns rather than as an engine that snowballs. Green has since accumulated a long line of single-target retrieval spells carrying various rates and riders, but the bones here are the plainest version of the effect: pay a little, get one green thing back, no strings attached.