As he headed into the dungeon, he began to notice a golden glow coming from one of the cells
He has a spear so he can reach through the bars of his cage and stab him. He got closer. The beacon was facing away from him, sitting with his tail tucked under him. His scales shone a brilliant gold, giving off a warm glow. He was unlike any Mer Siren had ever seen before, painting or otherwise. Small fish swam around him, attracted by the glow.
