That’s possible, but unnecessary. There’s no need sacrifice your victim to anything, as you aren’t actually gaining something. It’s not a magical ritual, simply the fact that human souls are torn by trying to kill someone in cold blood. The intent to murder, the decision to murder, is just as malicious whether or not the victim manages to escape. It make sense for that evil to tear the soul, but it does not make sense for there to be some invisible soul-ripping demon who demands human sacrifices.
That’s possible, but unnecessary. There’s no need sacrifice your victim to anything, as you aren’t actually gaining something. It’s not a magical ritual, simply the fact that human souls are torn by trying to kill someone in cold blood. The intent to murder, the decision to murder, is just as malicious whether or not the victim manages to escape. It make sense for that evil to tear the soul, but it does not make sense for there to be some invisible soul-ripping demon who demands human sacrifices.