Full body concept art of a huge slow zombie miner in a dark maze, strictly bipedal silhouette, two legs, two arms held wide away from torso not touching body, holding a rusty pickaxe in right hand, decaying grey skin, massive broad shoulders, short powerful legs, glowing yellow eyes, atmospheric lighting, detailed texture, 8k, unreal engine 5 render --ar 9:16 --no hands touching body, four arms, crawling