A caustic compound used in soapmaking, is derived from wood ash or produced industrially. Handle with care due to its corrosive nature. Essential for initiating saponification, the chemical reaction turning fats into soap. In fantasy worlds, lye might hold mystical properties or be guarded by alchemists for its transformative abilities.

A translucent crystal rests in your hand, its surface glinting faintly under the sunlight. The substance feels gritty, its texture akin to coarse sand. Its caustic aroma wafts subtly, a reminder of its potent, transformative power in the craft of soapmaking.