Thunder Mayhem is a monster, a blot upon the universe. Born of the mad science of Shockwave and Thunderwing, the combined form of the Mayhem Attack Squad is unique. And not just because it consists of six sparks in a body made from five, or because that sixth which gives this entity its life glows an unnatural green. No other combiner in existence is as strong, or durable, or dangerous. Entire armies have fought it, and entire armies have fallen.