ben d I have no idea where this whole concept of yours comes from, but it isn't what the Bible teaches.
The "clay body" was Adam's and the elements of the earth make up all matter. We as human offspring of Adam, are created by parents who come together to each donate a living cell which when united, forms a new human being. The process is miraculous, but there is no divine spirit that incarnates in that body such as occurred with Adam. He was a direct creation of God, but he had the ability to impart life as a life-giver to others. It is an undirected process.
The spirit that animates any living creature is its breath. A newborn takes its first breath as a natural process...all living souls breath the same air and experience the same "life" at birth. The thing that separates human souls from animal souls is that we alone are not programmed to die. The breath we receive at birth was supposed to keep on going...forever. When humankind fell into sin and disobedience, death came to us and now we lose our spirit when we breathe our last breath. Our hope of living again is by resurrection. There is no invisible, conscious part of us that goes anywhere when we die. Resurrection is a return to life, either in a spirit body to reign with Christ in heaven, or in a physical body, resurrected to live as an earthly subject of those heavenly rulers.