In the spirit realm, whatever is said becomes a reality, then, it can be same in the abode of the living, for powerful species, to say whatever they like for an immediate manifestation, it is the law in the astral planes, and we don't care about the destination of the acting forces.
In order to understand why one chooses to be a Tantric practitioner, there has to be an understanding of cause and effect, cyclic existence, the awareness that the reality that we think we are seeing is not reality as it really truly is. So enlightenment is seeing reality with bare awareness, non-conceptual reality.
What you knew in your childhood is true; the Otherworld of magic and enchantment is real, sometimes terribly real - and certainly more real than the factual reality which our culture has built up, brick by brick, to shut out colour and light and prevent us from flying.
Shapeshifting requires the ability to transcend your attachments, in particular your ego attachments to identity and who you are. If you can get over your attachment to labeling yourself and your cherishing of your identity, you can be virtually anybody. You can slip in and out of different shells, even different animal forms or deity forms.
Because, between ‘reality’ on the one hand, and the point where the mind strikes reality, there’s a middle zone, a rainbow edge where beauty comes into being, where two very different surfaces mingle and blur to provide what life does not: and this is the space where all art exists, and all magic.