True Dragon's Bone!
Of course, it wasn't just his skin that had undergone astonishing changes, forming four layers of mystical barriers, but also the over 300 bones of his body had evolved.
His bones had now transformed into True Dragon's Bones, which significantly increased in density, revealing many True Dragon Runes and making the bones appear dark gold.
It could be said that the hardness of his bones was now comparable to that of top-grade Tongtian Spiritual Treasures.
If he were to die now, the bones in his body could be used as materials for refining Spiritual Treasures.
Even after billions of years, they would not decay and could exist eternally.
Even the True Dragon's Bone would bring formidable strength, making the physique even more robust and indestructible.
Dragon Elephant Heart.
Without a doubt, his heart also underwent an astonishing transformation, filled with innumerable Dragon Elephant Runes, which made this heart more vibrant.