Venom Concoction Elixir

A sinister, dark-glass phial adorned with obsidian thorns and glowing green crystals at its base. The liquid inside is a thick, bubbling toxic bile, but its most disturbing feature is the large, reptilian eye suspended in the center. The eye remains perfectly still, watching its surroundings until the bottle is uncorked. A sickly, green miasma constantly leaks from the gnarly wooden stopper, signifying the lethal potency of the mixture within.