From Fate/Grand Order Wiki
Release Date (JP)
|In the hands of a skilled wielder, Volumen Hydrargyrum's silver stream can turn into swords, its waves into shields, and even its splashes can become deadly.
This is the supreme Mystic Code of the Archibald family, the depths of which an ordinary mage could never pierce.
All you lowly creatures who called yourself mages, you will know that your toys are of no match before true arts.
This CE increases Drops during Summon: by 3 (MLB: 4)