An ominously evil dark fantasy stylized crystal appears as a jagged, irregular formation, its facets unnaturally sharp and glistening. The material is a translucent, sickly green, like solidified acid, with dark, swirling veins of black impurities trapped within. It emits a vibrant, malevolent inner glow that pulses softly, casting eerie shadows. Its texture feels cold and dangerously slick, with razor-sharp edges that look corrosive to the touch, suggesting a dangerous, unnatural power.