Spore Swarm

Three bodies at instant speed, and the instant speed is the entire point. A sorcery-speed version of this effect would be filler; printed as an instant, four mana buys a combat ambush, a blocking trick that materializes three chump blockers after attackers are declared, or an end-of-step play that leaves your mana up long enough to bluff a counterspell you never had to cast. The Saprolings themselves are the cheapest unit Magic offers, but the card is not selling the bodies so much as the timing window: it lets a green deck hold up mana and decide, at the last possible moment, whether to commit to defense, feed a sacrifice engine, or widen a board ahead of an anthem. Fungus and Saproling strategies have wanted exactly this for a long time: a flash source of fodder that converts mana into population without telegraphing it a turn early. The rate is honest rather than generous, and that honesty is by design. Three power spread across three separate bodies is worth more than a single 3/3 to anything that counts creatures and worth less to anything that wants raw stats, which keeps the card squarely in the go-wide lane it was built for. What you pay for is not the total, but the freedom to spend that mana on the opponent's turn instead of your own.