cursed energy shard 3d model

A cursed demonic energy shard for a dark Taoist action game. The object looks like an irregular broken amethyst crystal, with a sharp asymmetrical silhouette and a deep purple to black-violet color palette. The surface is cracked and corrupted, covered with black vein-like patterns and traces of burned talisman markings. Inside the crystal, swirling dark purple mist and ominous energy can be seen, as if evil aura is trapped within. Small wisps of purple-black smoke drift around it, and the shard emits a faint unstable glow. The design should feel dangerous, mysterious, corrupted, and spiritually polluted, blending Taoist occult aesthetics with supernatural horror. High detail, clean presentation, game item concept art.