Number 8 of the Body Realms was later revealed to be the Adamantine Body, with Number 9 being the Platinum Body. The former was roughly equivalent to a Mid to High Rank GX-Rank Entity, whereas the latter—the current Realm Cassius was in—was the equivalent of the Late to Peak GX Rank.
In terms of the Ascension Tower, Cassius could already be considered an up-and-coming top powerhouse.
His body unbreakable and his Spirit infallible!
This brought up the matter of his Will and Trainer Rank, both of which had made major progress under the harsh environmental conditions of the nigh-boundless Supercontinent of Pathalon.
God Trainer Rank – Achieved!
Heavenly Will – Achieved!
Of course, both of these grand accomplishments could be partly attributed to the transfer of experiences that the Sword God bestowed upon him in the Humanity Ascension Tower. That, and hundreds of years of discovering new and profound ways to torture himself.
