Ancient traditions in the world such as those of the pre-Columbian peoples in the Mesoamerica,^[174][175] and the Greek Eleusinian tradition, celebrated mystical rituals between man and ethereal Gods that occurred through the effects of entheogens.^[176][177] In modern times, spiritual experiences still are seen in religious rituals of sects, such as the Ayahuasca cult, or in isolated experiences of free will.^[64] Aliens realized as ethereal beings are reported by persons under effect^[178][179] of thesepsychoactive substances.^[180]

Although there is a large diversity of experiences and outcomes, each entheogen profiles some own character,^[62][178] what allows to identify a convergent line of reports. Hence, in some of these accounts, persons who were under altered state of consciousness, claim to have made contact with the purported hamadryad of the entheogenic plant.^[178] In his writings the writer Castaneda, for example, personified the Peyote’s hamadryad by the name of "Mescalito".^[62][64] According to the researches and reports, some specific entheogens like the Peyote, the Ololiuqui, and those with DMT alkaloid, in particular the Tepezcohuite emphasize such features.^[178][181]

Peyote, with recorded use since 3780 B.C. by Oshara Tradition in USA.^[175]

Alongside a disturbed sense of reality, other shared point narrated by protagonists under these effects, it is the hamadryad showing itself as an alien, which also lives out of the Earth and already was waiting for that contact. That is, there is a strange duality that exhibits the alien being living at same time as a hamadryad on Earth, and as well in another dimension as an hallucinogenic version of the Quantum Entanglement.^[182] Such aspects were well observed by American writer Terence McKenna who describes them as "Machine elves".^[183]

Another recurrent elements are the loss of the sense of identity, lack of ability to think, a being which leads the person to an odd dimension, the meeting with more aliens, and the person being submitted to an ethereal abduction.^[184] Afterwards the aliens elucidate secrets of the universe to the subject, and usually welcome him to return soon.^{[178][179][185][186]}

According to theosophic author Alice Bailey, although seldom, alien beings from other planets can obsess or possess humans. The assistance of "violet devas", which are devas that perform in the etheric plane, helps to strengthen the human body to resist obsessions. Hence by means of the violet light, it is fortified the "etheric web", claims Bailey.^[137] Such concept finds some similarity in the tooldreamcatcher used by American natives for protection against mischievous spirits. According to native tradition, the nightmarish spirits are trapped in the crafted web and dissipate under the effect of solar specter.^[35]