Cave trolls

Deep in the darkest, dankest caverns and caves, they live. Their eyes are almost useless after decades of darkness, their skin has almost calcified in the constant drip of minerals and lava sediments, their wiry bodies gangly and tough as old leather. They exist on the blind fish and crustacae that cling on to existence  in the cold, clammy pools of their subterranean homes. If a goblin or