Pandora's Box 
To dream of Pandora's Box suggests a belief that you are dangerous or evil. A toxic belief system may be at play. You could be protecting yourself against intimacy because you may hurt your loved ones.
To open Pandora's box is a strong indication that you may need to seek help in opening your heart and may, in fact, be ready to do so.
Boa Constrictor
Seeing a boa constrictor in a dream represents something closing in on you. For instance, a deadline may be looming or you may keep getting work piled on. You may feel like life is 'tightening' around you and constricting your breathing (a symbol of your life).