Imagine a 3D model of a 10th-century dark fantasy troll, towering and fearsome, with gas-punk biomechanical enhancements. Its rugged green-gray skin harbors a complex gas engine, with brass pipes and whirring gears seamlessly integrated into its sinewy form. Inspired by Vallejo, Frazetta, and Brom, this troll is a terrifying embodiment of power.