Myr Quadropod

A defensive body that can punch when it has to, and the activated cost is the whole pivot. With a 1/4 frame, this Myr sits in front of the early aggressors all day; pay three and it briefly becomes a 4/1, enough to trade up into something it had no business killing or to push a surprise four through a board the opponent read as inert. The switch is repeatable, so the threat never goes away: an attacker reluctant to throw a 2/2 into a wall has to keep accounting for the possibility that the wall hits back. The math is the point. The same statline that makes it a poor attacker by default makes the swap dramatic, because flipping 1/4 yields a wider power swing than the same effect would on a balanced body. It is a slow, fiddly engine, the kind of colorless artifact creature that fills out a toolbox without asking for anything in return, and its appeal lives entirely in the flexibility of choosing which number matters this turn.