space wolf, Warhammer 40000, power armor, fur cloak, boltgun, chainsword, grim expression, battle stance, muscular build, space marine, wolf insignia, icy tundra, snowstorm, war-torn battlefield, debris, sci-fi gothic architecture, dynamic lighting, action pose, frost breath, detailed armor texture, metallic sheen, glowing eyes, 3/4 view, atmospheric perspective, high contrast, dramatic shadows, blizzard effects, epic scale, cinematic angle.