Complex sentence: Dmitrii and Dario attempt to kill him on separate occasions but are defeated, causing Celia to alter her strategy; she plans to draw out Dracula's influence within Soma outward and mold him into the Dark Lord by playing on his emotions.
Split into simpler sentences: Dmitrii and Dario attempt to kill him on separate occasions but are defeated. With the removal of the two candidates, Celia plans to draw out Dracula's influence within Soma and mold him into the Dark Lord by playing on his emotions.