Greater Ecdysis is a spell that is associated with the moth god. In Between lifetimes the Thetan sheds its energies and restores to its grand, god-like state. When it chooses to return, it is almost like a great mythical butterfly choosing to return to a small cocoon. Your astral body however does have the ability to perform a greater ecdysis regardless of you still being alive, returning to a state of pure energy and then reforming itself into whatever shape it wants. It then shortly takes on a new evolved form that is superior to what it had before. You do not necessarily do this to purge energies from your life, but to take on a new astral form when your old one seems old or does not match with the goals you have in the current lifetime. You may also need a spiritual refresh. It is good for changing life phases or moving on in life when you feel energetically stuck.
To cast a greater ecdysis, simply imagine your higher self leaving your astral body, and it falling apart like a cocoon. You can imagine this happening seamlessly or your astral body being slowly peeled and broken so the higher self can leave it. You will feel elevated, and your new form may even surprise you. Ecdysis of your astral body will change your core energy for a while and it may be overwhelming until you are used to it, but it’s almost like a rebirth or an evolution that happens. You can imagine your new astral body taking on the form you want, but this happens naturally and it corresponds to your spiritual practice.
You may feel yourself developing certain energies or you may end up taking characteristics of your animal persona such as brown wings, antlers, horns, etc. You may also have more subtle features like brown markings around your eyes like an owl, or scars and scratches representing past trauma and adversity. Other things you identify with, practice, and spirits surrounding you will influence the form you end up taking. After ecdysis, you may find yourself having an easier time connecting with certain deities, energies, or accessing your spiritual talents and potential. You will also find you have an easier time growing spiritually as in nature, insects and snakes habitually shed their outer skin or shells to grow. Your old soul body shell can be made into a shikigami or absorbed into your new astral body to strengthen it. Your old astral body can also be used for energetic armor, shielding, and wards.