The Blackcliff Agate is a sleek, dark-colored catalyst with a menacing aura, featuring a sharp, angular design that exudes power. Its body is crafted from a mysterious, polished black stone with crimson veins that glow faintly, suggesting a latent energy. The weapon is adorned with metallic accents and intricate engravings that depict ancient, forgotten runes, adding to its ominous and arcane appearance.