Aerial Engineer

A binary switch dressed as a body: hold a single artifact and the 2/4 becomes a 4/4 flier, a fine four-mana rate for an evasive clock. Without one, you are left with a defensive ground-blocker that trades down and stalls. The threshold does not scale, and that is the interesting part: the first Treasure token, Equipment, or leftover trinket flips the entire +2/+0 and flying, while the second through tenth do nothing the first did not. So the card is a payoff wearing a creature's clothes, asking the deck to commit to artifacts rather than earning the upgrade through its own text. The low base is deliberate. A 2/4 survives the opening turns when your artifact count might still be zero, giving you a wall to hide behind until the switch is live, then converts into a threat the moment anything metallic hits the table. White-blue artifact shells rarely struggle to field one cheap permanent, which is the entire premise: the floor is engineered to be forgiving so the ceiling can arrive cheaply. It is a synergy piece that knows exactly what it is, with no pretense of standing alone.