Levels (Spoiler)

Human Cultivation Realms

- Opening The Inner Palace

- ??

- ??

- ??

- ??

- ??

- ??

- ??

- ??

Ghosts Cultivation Realms

- Apparition

- Lingering Spirit

- Fierce Ghost

- Baleful Ghost

- ??

- ??

- ??

- ??

- ??

Human Cultivation Realms (who absorb ghostly spiritual energy directly)

- F

- E

- D

- C

- B

- A

- S

- SS

- SSS