The Blood Core had been in the form of a bone slip when he had first obtained it.

After he had carried it around and nourished it with his own flesh power for so many years, and adding in the flame power it had gathered over all these years, it had gone through many mild changes.

It had gone through a significant change when it had reunited with the Flame Dragon Armor.

The Blood Core had long since shed its form as a bone slip, and assumed the form of a dark-red walnut that ...