Skymark Roc

The attack trigger is built as a tempo tax with a sharp ceiling: it bounces only creatures with toughness 2 or less, which means the Roc clears chump blockers and small early drops but bounces off anything that has grown into a real body. That cutoff is the whole balancing act. A 3/3 flier for four already pressures from the air, and a free bounce every swing would be oppressive; pinning the effect to fragile defenders keeps it as a recurring edge rather than a lock. Note the timing, too: the return resolves on the attack declaration, before blocks, so the ability removes a would-be blocker rather than saving the Roc after a block has been assigned. Against a board of small creatures it generates a swing of tempo every turn (a removed blocker plus an unanswered three points in the air), and against a board of larger threats it does nothing but the flying. The design sits in the long lineage of evasive blue-white beaters that come attached to a soft removal rider: enough to grind an opponent who stumbled on early development, not enough to break open a stalled board. Its best home keeps steady pressure in the air while sweeping the ground clear of the cheap blockers that would otherwise gum up the clock.