'Metamorphosis'. Meta meaning after and beyond. Morphosis meaning the way in which someone or something changes...'transformation'.
Every living organism goes through 'Metamorphosis,' it is inevitable and often necessary. I particularly like the way the word is used in mythical and magical stories.
The Nymphs in Greek mythology were responsible for the care of plants, animals and the wild. They came in the form of 'fairy' like women who would transform into trees and flowers. The most famous of these is Daphne who was loved by the God Apollo. He pursued her until she became so exhausted she asked for the help of Gaia who transformed her into a laurel tree.