Unseen Walker
The interesting move here is not the forestwalk on the body, which is the kind of self-contained evasion a 1/1 dryad has carried since the earliest sets. It is the activated ability that hands forestwalk to anything you choose: a way to weaponize an opponent's own basic land against them. Most evasion in green is granted to the creature that already has it, or built into trample and reach; this one externalizes the keyword, turning a single Forest in play across the table into a blanket unblockable clause for whatever you point at. The cost (, repeatable) means the dryad reads less as a beater and more as a pilot for a wider board, the kind of enabler that quietly converts a stalled ground into lethal damage by routing your largest threat around the only color of blocker that matters. The obvious tension is that the whole engine is conditional on the defending player controlling a Forest, which makes it a green answer to other green decks more than a universal tool, a piece of design squarely rooted in an era when landwalk was a real strategic axis rather than a vestigial keyword. As a build-around it asks one question: is the table playing Forests? When the answer is yes, a 1/1 for two mana becomes the key that unlocks every other attacker you control.

