Ulvenwald Hydra
Most lands-matter payoffs ask you to commit a deckbuilding theme before they reward you; this one supplies its own setup. The enters trigger fetches any land onto the battlefield, which means the body grows by one in the same breath it arrives. So a six-mana cast that resolves with five lands already down lands as a 6/6 with reach, six lands as a 7/7, then climbs every land drop after. The choice of "any land," not just a basic, is the quiet load-bearing decision here: it can pull a manland, a utility nonbasic, or whatever single piece a deck wants most, and the search counts toward the power as a side effect. That built-in tutor lifts it above a plain count-your-permanents creature, whose stats only read off the board state you already built. Reach matters more than it looks: a green creature whose toughness scales with land count wants to survive on the ground and brick fliers, and a top-end threat that also walls the air does double duty as both the curve-topper and the defensive anchor. The honesty in the design sits at the floor, not the ceiling: with few lands in play the Hydra arrives small, since its size is yoked to a resource you can flood but cannot fake. The tutor cushions a stumbling draw by one, but the rest of the size is earned by lands actually on the battlefield.
