Complex sentence: A malevolent witch who is the main antagonist of "The Spook's Apprentice", able to use blood magic and committed atrocities like pretending to be a boarder for expectant mothers so she can kill them and their babies to use their blood.
Split into simpler sentences: A malevolent witch who is the main antagonist of "The Spook's Apprentice". She is able to use blood magic and has committed several acts of murder, like pretending to be a boarder for expectant mothers so she can kill them and their babies in order to use their blood.