A small, intricately designed vial containing a dark, viscous liquid that seems to pulsate with a faint crimson glow. The vial is made of thick, opaque glass with subtle imperfections, suggesting handcrafted origin. The stopper is crafted from aged brass, adorned with arcane runes that hint at its vampiric nature. The liquid inside occasionally forms swirls, as if alive, reacting to unseen forces.