incubi — an imaginary demon or evil spirit supposed to descend upon sleeping persons, especially one fabled to have sexual intercourse with women during their sleep. Compare succubus (def 1).
horrors — an overwhelming and painful feeling caused by something frightfully shocking, terrifying, or revolting; a shuddering fear: to shrink back from a mutilated corpse in horror.
fancies — imagination or fantasy, especially as exercised in a capricious manner.