Woodcaller Automaton

Green's oldest trick is turning a land into a beater, and this Construct folds that trick into the split-mode chassis so cleanly that the small side does something the rest of its cycle never bothers with. Pay the four-mana green cost and the enter trigger untaps a land and animates it: because you almost certainly tapped that land to cast the spell, the untap refunds the mana on the spot and hands you a hasty 3/3 Treefolk that keeps making mana between swings, while the 3/3 Construct waits out its summoning sickness. Two attackers' worth of pressure from one card, one of them still functioning as your manabase. Cast it full for its printed colorless cost and the trigger scales with it: an 8/8 land standing beside an 8/8 body, both animated and both from a single spell. That scaling is the whole tension. The land takes its base power and toughness from this creature's own power and toughness, so the choice is never abstract: a cheap early threat that leaves a modest Treefolk behind, or a patient late-game haymaker that leaves an enormous one. Colorless and green are precisely the identities built for oversized creatures, and the design stays inside that lane rather than reaching past it, condensing the land-animation lineage into a printing that answers to both the tempo turn and the top of the curve.