The Seal of Clarity is capable of translating any language into one the user can decipher, and unlike the other artifacts, was a tool, not a weapon. It was originally protected by Kahina upon being discovered by The Others.
After defeating Black Manta, the Seal of Clarity was recovered by The Others. It remained in the custody of the Operative until Kahina's spirit contacted Sky Alchesay, a novice shaman, telling her the Seal was hers to use. Once Sky proved to The Others that she spoke the truth, they left the relic under her protection.