Raking Canopy

Anti-flying enchantments occupy a strange corner of green's color pie: the color has long been denied reliable answers to threats in the air, so it gets them instead as a static tax, a wall you leave standing rather than interaction you hold up. The damage here is asymmetric in a precise way. It does nothing on offense and nothing against ground creatures; the only attacker it punishes is a flier swinging at the controller specifically. Four is the load-bearing number, large enough to kill most evasive threats outright on the swing rather than merely deterring them, which turns the card from a fog into a deterrent that actually clears the board over time. The mechanism is automatic and inescapable: no targeting, no activation cost, no decision for the controller to make. The flying attacker simply takes four for the crime of attacking. That puts the strategic weight entirely on the opponent, who must decide whether the flier is worth feeding into a guaranteed four-point counterswing every combat. As a permanent it sticks around, so the tax compounds turn after turn, and any board built to close games through the air gradually pays itself flat. This is green's preferred shape for the effect: not a held-up answer, but a standing condition the other side keeps paying or stays on the ground to avoid.