As Bruticus grabs the 'head' of the massive golem, he manages to shatter it with ease. As it's a mass of solid stone, it has no need for a head, or organs, as such. Instead, the mass of stone transforms, forming 4 arms, which lock around Bruticus's massive torso. Gaia pulls, as the arms grow larger, and start covering Bruticus, slowly morphing into a stone shell that would lock Bruticus away, and then crush him.