Gale Force

Color-pie maintenance, drawn in green's bluntest hand. Green is famously denied the ability to interact with creatures that have flown over it, so the answer green is allowed is not a removal spell that picks a flier off the stack or shoots one out of the air at instant speed: it is a sorcery that wipes the entire sky at once and asks nothing about which fliers are yours. Five damage to each flier is enough to clear most things with wings short of the genuinely fat, and the sorcery timing is the cost: you cannot ambush an attacking squadron mid-combat, only sweep on your own turn before the swing comes. That places this in green's long tradition of anti-flying answers that are mass-scale rather than surgical, sitting alongside reach creatures and fog effects as green's sanctioned reply to the air it cannot otherwise touch. The asymmetry against grounded decks is total: a board with no fliers eats nothing, which is exactly how green wants it, since green's own threats tend to keep their feet on the ground. It is a wide hammer for a problem green is structurally bad at, and the bluntness is the point.