A towering primordial lava golem with a molten interior pulsates through its cracked, rocky exterior, launching a fiery onslaught in a devastated futuristic cityscape. Its blazing fists swing with tremendous force, leaving trails of thick smoke that choke the air. As it moves, rivulets of lava streak down its form, searing the metallic debris and scorched concrete underfoot. The golem's every step sends tremors through the ground, as twisted skyscrapers groan under the oppressive heat. Sparks fly off the burning golem, igniting the remnants of advanced technology, while its molten heart glows menacingly through fissures in its rocky shell, embodying both ancient power and destructive fury amid the urban chaos.