Adamantine, a black, ferromagnetic metal, glows green under candlelight and purple-white under magical light. Weapons made from it never dull, dealing critical hits to objects. Adamantine armor nullifies critical hits, reducing them to normal. Brittle in raw form, it becomes unyielding after forging, resistant to mundane deformation.
The black ingot rests heavily in your hands, its surface polished yet imperfect, etched with an ancient maker's mark. In candlelight, a faint green shimmer emerges; under magical light, it reveals a striking purple-white glow.