Imagine a striking and mysterious sci-fi concept art piece depicting a monumental metallic vessel that hovers amidst white smoke and light particles. The dark green ship emanates an aura of grandeur and enigma as it floats above a city, surrounded by clouds and glowing lights. Vintage-style industrial structures adorn the massive craft, enhancing the scene’s warlike atmosphere. The overall composition captures the vastness of urban landscapes and the majestic presence of combat ships in a cinematic and anime-inspired style.