Fertilid

The trick here is that the ramp is finite and the body pays for it: each fetch costs a +1/+1 counter, so a creature that lands as a 2/2 can pull at most two basics onto the battlefield before it shrinks back to its 0/0 base and dies. That ceiling is the whole balance. Most green ramp creatures either tap for mana indefinitely or ramp once on arrival; this one front-loads a 2/2 body that you spend down into lands, turning the creature itself into the resource being converted. Until you start cashing out, you have a serviceable blocker, and the choice of when to begin spending the counters is a real tempo decision rather than an automatic one. It also fetches for any player, which quietly makes it a political tool as much as a personal ramp piece. The basics-only, enters-tapped restriction keeps the rate honest against a Cultivate or a Rampant Growth, but the counters open something those cards cannot touch: it interacts with proliferate, with counter-doublers, and with anything that wants a creature it can grow and then drain for value. A 0/0 that arrives as a 2/2 and walks itself to the graveyard two lands later is an unusual shape for a mana creature, and the design has aged into a reliable green build-around precisely because the spend-down is legible every step of the way.