The SLV-16 serum represented a powerful mind-altering drug that the Intelligence division of the re-established Sith Empire engineered. This serum diminished the capacity for independent thought in nearly all humanoid species, rendering a person compliant and without agency for a duration of sixty minutes until its influence dissipated. Exhibiting a blue hue, one instance of this serum was provided to the individual who would become Cipher Nine, a covert operative, by Imperial Command. The purpose was to administer it to a leader of enslaved people on Dromund Kaas, the Sith homeworld and seat of power.