Orc warlord on crumbling citadel above stormy battlefield

A colossal Orc General, armored in biomechanical plating that melds with ancient runes, stands atop a crumbling citadel overlooking a storm-ravaged battlefield. His cybernetic eye glows with malevolent energy. The style is dark fantasy concept art, with a gritty, desaturated color palette, dramatic chiaroscuro lighting, and an atmospheric, ominous mood. Think H.R. Giger meets Frank Frazetta.