Permanent Serum is a hypothetical or fictional concept often seen in sci-fi or fantasy genres. It typically refers to a serum or substance that grants permanent effects, such as immortality, enhanced abilities, or irreversible transformations.
Possible traits of a Permanent Serum:
Long-lasting or irreversible effects (unlike temporary serums).
May grant eternal youth, superhuman strength, or immunity.
Could have dangerous side effects (e.g., loss of humanity, mutations).
Often a sought-after (or forbidden) substance in stories.