Terramorph

Rampant Growth put a basic land onto the battlefield for two mana; the split into a four-mana cost and a rebound clause reprices that same effect as two fetches spread across two turns. What you buy is a ramp spell that pays out twice, but the second payment is locked to a specific window: rebound exiles the card on resolution and lets you recast it for free at your next upkeep, no sooner and no later. That timing constraint governs everything about how the card plays. You cannot fetch both basics in a single explosive turn, so it does not front-load its acceleration the way a cheaper single-shot ramp spell does; instead it commits you to a two-turn curve where the first cast lands a basic and pushes you toward five available mana, and the following upkeep lands another before you have even drawn for the turn. Rebound also requires that the spell be cast from hand for the exile-and-recast to fire, which resists graveyard-recursion tricks that would otherwise loop it. The result is a smoothing engine more than a burst of speed: it thins two basics from the deck and fixes colors across a turn cycle, trading raw tempo for redundancy and inevitability. This is ramp built for the long game, where guaranteeing your next land drop matters more than getting a single mana ahead this turn.