Nantuko Cultivator

Lands clog the hand in the late game, and this trades that surplus for board presence the moment it resolves. The trigger is a clean conversion: each land you discard on resolution becomes a +1/+1 counter and a card off the top, so the decision is live every time it enters. Pitch nothing and you have a plain 2/2 with a dead trigger; pitch three and you have a 5/5 that has cycled three flooded lands into three fresh looks. Note the shape of that swap: this is filtering, not raw card advantage, because every card drawn costs a card discarded. You break even on hand size and trade quality for quality, turning dead fixing into whatever the deck still needs. The constraint that ties the engine to its purpose is that it eats only lands, never spells, so its ceiling is bound directly to how flooded you are, and a flood is precisely the board state it converts best. That makes it a payoff for hands that have already hit their land count, where extra mana has stopped doing anything: each land you discard is one you accept you will never get to play, exchanged for a counter and a draw that might be live. Timing is the whole gamble. Pitch too early and you starve your own curve; pitch too late and the body is too small to matter. It is green looting welded to a beater, paid for not in mana but in the resource green produces in the largest quantity and least often wants in hand by the back half of a game.