Air Servant

The activated ability is a quiet specialist: pay two and a blue, and a flier of your choice stays grounded, every turn, indefinitely. Against the ground game this body does what any 4/3 flier does, but in a sky duel it functions as a recurring soft lock, neutralizing one opposing evasive threat at a time while it keeps swinging through the air itself. The restriction is the tell. The tap only reaches creatures that share its own niche (flying), so it is harmless against a wide ground board and pointed precisely at the matchups where a 4/3 in the air would otherwise be racing rather than dominating. It does not kill the blocker, only taps it, which means it answers attackers and removes blockers but resets every turn rather than committing to a permanent solution. That repeatability is the appeal: a single Air Servant left unanswered can pin down an opposing dragon or angel game after game, turning a flying stalemate into a one-sided clock. The card belongs to a recurring blue template, the evasive creature that pays a premium to carry a control valve, and the build asks you to treat it less as a beater than as a tap-down engine that happens to attack for four.