Become the Cosmos

Only the most trusted of followers may gain his patron's deepest secrets, but even the deepest of secrets cannot be entrusted to mere mortals, so for them there is this spell. For the truly devout, death is preferable to betrayal.

When cast, this spell causes you to die immediately, and your body disintegrates into space dust. After this, your soul wanders the astral plane, untethered from any mortal form. 

This spell does not require a spell casting focus.