A small, intricately designed vial containing a dense, dark liquid that seems to absorb light. The vial is made of thick, leaded glass with a slightly rough, uneven surface, giving it an ancient, handcrafted appearance. The stopper is a tarnished silver with intricate gothic engravings, suggesting its use in forbidden rituals. The liquid inside is viscous, with a faint, eerie glow that pulses slowly, as if alive.