on Helping Writers become Authors:

The final two archetypal character arcs within the life cycle signal a distinct departure from the realm of the known.
After sacrificing herself for the Kingdom at the end of the King Arc, the seemingly diminished Crone, leaves behind the “real” world of Kingdom and throne and enters instead the spooky forests and liminal hinterlands of Elderhood.
Symbolically, the final two positive arcs—Crone and Mage—are decidedly more supernatural than those that preceded.