After advancing to an Eighth-Rank Necromancer, Medivh could add bones with histories of over thirty thousand years to his list for refining and resurrection.
Bones with histories between thirty and sixty thousand years were Jade-Grade Bones.
The histories of Jade-Grade Bones were divided into more distinct layers. Each ten thousand years marked a new layer, with the grades, in order, being Low-Grade, Mid-Grade, High-Grade, and Supreme-Grade Jade Bone.
Jade Bone Skeletons were born as Eighth-Rank Bone Spirits, with a growth limit as high as the Fourteenth Rank. Their foundations were solid and their potential terrifying, though realizing that potential was just as challenging.
Bones with histories of tens of thousands of years were basically impossible to preserve intact unless the environment was particularly unusual.
Bones with histories of over sixty thousand years belonged to the final bone grade: Source Bone.
After advancing to Eighth-Rank Necromancer, Medivh's ability to analyze history grew even stronger.
Source Bone had no grades. Bones with histories of sixty thousand years and those with histories of hundreds of thousands—or even millions—of years were all the same.
Source Bone Skeletons were born as Ninth-Rank Bone Spirits, with a growth limit of the Fifteenth Rank.
At this point, the limits of Medivh's talent as a mage had come into view. At most, he could create Ninth-Rank Bone Spirits in batches, and the highest growth limit of the Bone Spirits he created was the Fifteenth Rank.
According to the transcendental rank system of the Endless Star Sea, the Tenth through Twelfth Ranks were the Legendary Rank: Lower Legendary, Mid Legendary, and Upper Legendary, respectively.
The Thirteenth through Fifteenth Ranks were the God Rank: Lower God, Mid God, and Upper God, respectively.
Above the God Rank was the Main God Rank, or the Sixteenth Rank.
Before the Goddess of Light