Board Thread:Theories and Speculation/@comment-1872728-20200725151448/@comment-32685487-20200730162349

We don't know if Oro had Jugo's enzymed in himself before the 4th War, but Kabuto had them in himself when he went to Ryuchi Cave. Oro recreated Jugo's Cursed Seal to implant onto others by using Jugo's enzymes and Oro's own Senjutsu chakra. So Cursed Seal is essentially Jugo's ability but recreated and copied to other users with different Seal designs.