But it is actually full of evil books and magic tools The Magic Spell and Evil Plan That night while the Knight and Una are sleeping Archimago begins his evil plan He opens his magic books He performs black magic to call two evil spirits He uses these spirits to create a lustful dream for the knight and a fake Una As Spenser writes He seekes out mighty charmes to trouble sleepy mindes Archimago sends the lustful dream into the knight s head and makes him see Lady Una behaving in a shameful way The second spirit is changed into a false Una The Knight Believes the Lie Archimago s evil plan works The knight wakes up from the lustful dream He sees the fake Una trying to seduce him He becomes very angry He thinks Lady Una is not pure Without asking her anything he leaves her alone in the forest In short Archimago traps them using false appearance and lies This shows how falsehood can break trust even between good people