Darklit Gargoyle

A white flier with a black mana sink, which is the design's whole personality: the body is fully castable by any white deck, but the +2/-1 pump only fires for black, so the card earns its full value in a white-black shell where both colors are already on the table. The activation is deliberately lopsided, trading the toughness that keeps the 1/2 in the air for raw power: one pump turns it into a 3/1 that flies over and bites for three, but the math caps itself, because a second activation drops the toughness to zero and the gargoyle dies as a state-based action before it can connect. So the pump is a single-shot burst, not a stackable finisher; you spend the black mana on the turn the extra reach matters and hold the body back as a defensive flier the rest of the time. That self-limiting ceiling is the cost of the cheap rate. The interesting wrinkle is the artifact type, which does nothing for the cost (you still need white to cast it) but does mean it survives color-targeted artifact-vs-creature interactions on either axis and reads as a small machine rather than a stone gargoyle in flavor. A modest aggressive piece, then: an evasive two-drop that uses an off-color activation to punch for a turn, with a built-in governor that keeps it from doing more.