Other extinct astral beings found different ways to adapt to new modes of existence through the use of so-called “energetic vampirism.” How does this come about? Let us recall that all living things have a protective psi-field around them that ensures optimal conditions for sustaining multicellular life forms and protecting them from the influence of other psi-fields. In addition, the psi-field holds a large supply of energy derived from the primary matters released from disintegrating food ingested by the organism. When energy vampires find a creature with little or no psi-field protection, they penetrate the shield, invade its spiritual structure and steal a portion of its life energy, the energetic potential generated by the victim’s physical body. This hastens the exhaustion and deterioration of the victim’s physical body and leads to premature death either violently or from natural causes. Energetic invasion of this kind can be either intermittent or continuous. To effect such penetration, astral beings must break through the qualitative barrier between the physical and etheric levels of the planet, and, in some cases rupture an additional barrier — that between the etheric and astral levels. Only some astral beings have the energetic potential required to acomplish this.
    Another factor is the thickness of the barrier, which varies according to the time of day. It is maximum during the day and minimum at night, especially between midnight and 4:00 a.m. Thus most energy vampires are night predators. (This phenomenon will be explained in a later volume.) The density of the barrier also depends upon variations in the energetic structure of different places on the planet’s surface. In planetary regions of positive geomagnetic influence the barrier between the planetary spheres is most dense and strong, while in regions of negative geomagnetic zones the barriers may be very weak or completely absent, even during the day. [word] The Final Appeal to Mankind by Nicolai Levashov