Three does not count

Diarmaid Irwin in the Jiang residence has already made the "Seal of Blood Curse" needed for the blood curse technique. All he has to do now is wait until late at night, when the guards of the Huangfu and the Fairchild Family are lax, and then inject this "Seal of Blood Curse" into the bodies of Xiao Dingshan and Huangfu Ji.
Once the blood curse technique is officially implemented, no one in the world can solve it unless Diarmaid Irwin himself is willing to do so. Because the principle of the...