User blog comment:Xilinoc/Ch. 596 - Rubb-Dolls 3/@comment-5693502-20140910133132/@comment-117598-20140910154250

Then how could Mayuri have prepared the perfect drug that counters her ability? He had to have observed her at one point to see how it worked, or else Kubo just writes Mayuri to fix things with Deus Ex since he just so happened to have a wonder drug in his pocket that somehow counters Giselle's ability exactly.