Heartwood Giant
Green spends most of its history walled off from direct player damage, leaning on creatures and trample to get through. This 4/4 Giant reaches over the top without a single attacker, by routing the burn through a resource sacrifice rather than a spell: every Forest becomes a potential two-point burst at the opponent's face, no combat required. The design is honest about its costs. This is reach, but each shot strips a card from your manabase, so the clock you build with it is also the clock running against your own development. And the tap symbol enforces a hard ceiling: once per turn cycle, no matter how many Forests you can spare. That single restriction is what keeps the engine from running away with the game. You cannot bury anyone in a flurry of activations; you can only chip, one land and one turn at a time, trading the long game for a slow way to close it. It functions less as a finisher than as a controlled demolition of your own position, the kind of self-inflicted friction green rarely gets to play with. The mana value is steep enough (five) that the Giant arrives late, by which point the choice it offers is stark: keep developing, or start dismantling your own engine to convert leftover land into damage once the board has stalled.

