Conductor of Cacophony

A pinger built on a fuel tank rather than a fixed clock, where the +1/+1 counters are not decoration on the body but ammunition. It arrives with two counters, and every activation converts a point of size into a symmetric point of damage dealt to each other creature and each player. That coupling defines the design: the more you shoot, the smaller the shooter gets, and once the counters are spent the button goes dark. Note the escape hatch the wording grants its owner: the ability hits each other creature, so it never damages itself and never dies to its own activation. It can whittle itself down to a 2/1 that still swings while the opposing board gets ground into the dirt. The symmetry still cuts against the pilot, though, draining their own life and threatening their own small creatures, which pushes it toward builds light on x/1 bodies and stocked with incidental life gain or counter-adders that can reload the fuel. It sits in the long lineage of black repeatable-damage engines that punish wide, cheap boards, but where many of those offer a renewable clock, this one rations its shots and asks you to weigh each activation against the future of the engine firing it. The counters open a second axis, too: anything that proliferates or piles on more +1/+1 counters does not just grow the body, it restocks the artillery.