Stratozeppelid

The defensive line drawn here is unusually specific: a flyer that polices the skies and nothing else. Most evasive blockers can drop down to trade with ground threats in a pinch; this one cannot, by design. A 4/4 flyer for five has been a fair, undemanding rate going back to creatures like Air Elemental, so the design buys its body back with a restriction rather than with stats: it can hold the sky against anything with wings, but it blocks nothing on the ground, leaving you to find your reach against an opposing flyer somewhere else if this one is already busy. Pricing a stat line this way leans on the half of the battlefield blue cares about most. Blue has always wanted to win the air war and stall on the ground; a creature that can only ever contest the air fits that instinct cleanly, even if it does the job at the cost of being a complete bystander to anything walking underneath it. The result is a body excellent at exactly one task and inert at the adjacent one, a more literal commitment to the "flyers fight flyers" idea than most cards bother to make.