The sling pellet gleams like polished obsidian, smooth and cold as midnight frost between your fingers, its surface etched with faint, writhing voids that swallow light. When loosed, it whistles through the air, trailing a comet's tail of inky shadow that coils and expands into blinding gloom. Impact shatters it into a blooming cloud of impenetrable black, muffling sounds and chilling the air with ethereal frost.