"Huh?"
Susi looked at the Homebody Witch with wide, bewildered eyes, not quite understanding what "becoming a spirit" meant.
"It's when plants gain intelligence and become plant-type intelligent creatures like tree-men or tree spirits."
Dorothy briefly explained, but seeing the sickly beauty still looking utterly clueless, she felt quite helpless.
The concept of becoming a spirit isn't exclusive to the Eastern Universe; there's a similar notion in the Western Universe's Study of Magic, like necromancy through magic wands or warship girls, which are unusual forms of becoming a spirit.
Speaking of plants gaining intelligence, the Elf Race's tree-men guardians are classic old settings. These ancient trees in the forest can awaken wisdom and turn into tree-men through the elves' magic stimulation.
