. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "The Master Serum"@en . . . . . . . . . . . "The Master Serum is the serum that is created when all four Branch Serums and the Madrigal Branch Clues are combined in the right proportions. If the Madrigal Clues are not added, a lethal and deadly Master Serum is created instead."@en . . . . . . . . . . "The Master Serum is the serum that is created when all four Branch Serums and the Madrigal Branch Clues are combined in the right proportions. If the Madrigal Clues are not added, a lethal and deadly Master Serum is created instead."@en . . . . . . . . . . . . . . .