Cloudsculpt Technician

A defensive body with a conditional offensive switch: 1/4 flying is a wall that happens to fly, brickwalling almost everything an early aggressive draw throws at it, but the moment you control any artifact it becomes a 2/4 flier that pressures back. The design leans on a very low bar for the upgrade (a single artifact, any artifact, of any kind), which turns the creature into a payoff that costs almost nothing to enable. That is the tension worth naming in a common-slot creature: it wants to be evaluated twice, once as a stall piece in a controlling artifact deck that always meets its own condition, and once as a clock in the air when the board stalls out and evasion decides the game. The toughness of 4 is doing quiet structural work here, keeping it above the range of the cheap burn and small attackers it is most likely to face, so it survives to matter in both modes. The +1/+0 is not much on paper, but a two-power evasive body that also holds the ground is a better rate than the raw numbers suggest for a three-mana common built to reward you for doing what an artifact deck already does. It is filler with a real ceiling: unremarkable in a vacuum, quietly efficient the instant its enabler is anything you were going to play anyway.