S - Inborn special abilities from physique/bloodline. Can have more than one bloodline ability.
SR - Has a special physique/bloodlines akin to mythical/legendary beasts (Example: Dragon Bloodline, Phoenix Bloodline, Lightning Spirit Veins, Fire Spirit Veins, etc. ). Able to use the advance power of their bloodline abilities.
SSR - Pure Bloodline/Physique. Able to wield the full power of their bloodline abilities and Body Physique abilities.
Black - Bloodline/Physique of Deities or what you call Lesser Gods
[Magic Power Classes]
E - Unable to use magic power.
D - Very little magic power. Just enough to use storage items like storage rings, storage bags etc.
C - Is able to cast basic magic spells. (Example: Stone Bullet, Fire Bullet, Water Bullet, Air Bullet, Cure etc.)
B - Able to cast second level spells. (Example: Fireball, Stone spikes, Water Ball, Air Slash, Heal etc.)
A - Has the ability to feel and harness the flow of mana in the surroundings. Can use the mana to enhance their magic power to cast advanced third level spells.
S - Larger mana pool and able to cast spells simultaneously. Can use 4th level magic spells. (Example: Fire Wall, Stone Wall, Hydro Ball, Air Blast, Great Heal.)
SR - Able to fly in the sky with the use of magic power in the environment. Can summon Elementals to fight for them and use 5th level magic spells. (Example: Fire Elemental, Mass Healing, etc.)
SSR - The Pinnacle of the Mortal Realm. The power they wield are able to destroy cities. Can use up to 7th level magic spells. (Example: Summon Lord Class Elementals, Greater Mass Healing, Fire Storm, Lightning Storm.)
Black - Breaks through the boundaries of the Mortal Realm. The powers they wield are akin to Deities or what you call Lesser Gods.