Hungry Megasloth

Green's usual mana sink asks for something else to spend on: trample to end games, hexproof to protect an investment, another creature to develop. Here the sink is the body itself. Two mana and a tap adds a counter, then again next turn, and again after that, a linear climb rather than an explosive one. The reach is the quiet part that changes what the card is: a 3/3 with reach already trades with most early flyers, and a version that has banked a few activations blanks air assaults entirely while growing out of burn range on the ground. That combination of blocker-turned-threat is a deliberate shape for a plain green beater, giving a creature something to do with excess lands in the late game without asking for a single other card in the deck. Because the activation taps the creature, the natural window is the opponent's end step: pump on the back half of their turn so the Megasloth stays untapped and larger to block through their next attack, rather than sinking mana while it still has attacking or blocking to do. It thrives in stalemates: when neither side can attack profitably, the player quietly adding a counter every turn is the one who eventually breaks the parity. A self-contained midrange body for green decks that want a threat immune to running out of gas.