Being constantly reminded of our goal can be powerful. If you decide to place this card in versatile areas with a lot of traffic or narrow oscillatory window seals, be sure to tape it because I am sure that none of us want to attract the tenebrous ones. That is just transference though.
Although an advanced black magician can get past a pentagram easily, these cards, when strategically placed in every door and window seal, keep lower level malignancies (from Latin male 'badly', and -gnus 'born') away, allowing us to place more effort on other things. My Mom and I learned this with pain. We only placed the cards in certain places, i.e. my room. This made the astral parasites angry and go to the next available host (my Mom) in more fervor. So, it taught us to seal our home at every possible entry point.
Ultimately, "The best weapon that a human being can use in life is a correct psychological state.” ―Samael Aun Weor, Treatise of Revolutionary Psychology
... yet these little cards continually create a conscious reverence for the environment, fusing the external world with psychological strength.
They are a great piece to have and I also gave some to close friends for protection of there homes
Beautiful, practical and powerful. Arrived in perfect condition. We placed it on our altar.