Zendikar Farguide

Forestwalk is the oldest family of evasion in the game, and it has always carried the same liability: it does nothing unless the player across the table happens to be on green. A 3/3 for five mana that can only slip past Forests is paying full retail for a body and getting situational unblockability stapled on, contingent on an opponent's color choice rather than anything the controller can guarantee. The keyword's payoff lives entirely in the defending player's manabase, an early-era reward for reading your opponent's colors correctly. This is a clean, unadorned example of the species, with no second ability to redeem the keyword when the Forests never appear. It belongs to the broad lineage of green creatures whose evasion is real but contingent, a design lever Wizards has largely retired in favor of trample and reach, both of which deliver their payoff regardless of what the opponent is playing. What it does well, it does only against the right table: a recurring, unanswerable clock that a green deck cannot wall off with a bigger blocker, because the wall is exactly the thing that makes it transparent.