I am writing about this based upon my own personal experiences with these type of spirit beings. During these experiences, I have discovered a pattern from these deceptive beings.
(1) These beings try to control you by fear. They may do this by threatening or terrorizing you if you rebel against them. They will even go as far as sending you visions of your destruction just to keep you inline. But these visions are not real. They are just illusions.
Please remember that we as humans give these beings a lot of power when you give into these threats. These beings can only harm you IF you allow them to. We as humans have the will power, strength and the ability to make our own choices without the fear of getting into trouble if you disobey a being that may appear unto you.
(2) Sacrifices.
If you encounter a being that request a sacrifice in return for its services, please STAY AWAY from this being and have no further contact with it. They are vampyric in nature. These beings vibrate at low frequencies, and need some form of sacrifice to gain energy. These beings usually stay at one level constantly due to the fact that they have to deal with the karmic consequences of their actions.
First off, it will be wise to contact high level beings instead that are not dependent on sacrifices. These would not require sacrifices, but instead they will give you good advice, knowledge and wisdom that will help guide you.
(3) Auras
Pay close attention to the auras being given off and the colors. If you are NOT comfortable, that is you subconscious giving you a warning about the being.
Remember, ALWAYS test all spirits. If a spirit being is hesitant in explaining what it wants from you then most likely it is hiding something.
I do hope this help out the psychics on this site to recognize an evil spirit so that they will not be deceived into thinking that these beings are their spirit guides.