The Black Stone (Weapon) is a dark, obsidian-like shard with a jagged, irregular shape, resembling a fragment of a larger, ancient weapon. Its surface is highly polished, reflecting light with a deep, ominous glow, and features subtle, glowing red veins that pulse faintly, suggesting an inner magical energy. The stone is cool to the touch, with a weight that belies its size, indicating a dense, otherworldly material.