Upper Extreme Heavenly Eagle.
Fang Yuan had long heard of this Primeval Ancient Beast's great name, but he did not know what a Heavenly Eagle's egg specifically looked like.
The Upper Extreme Heavenly Eagle was a space path Primeval Ancient Beast. An adult Upper Extreme Heavenly Eagle could freely travel between the Primeval Nine Heavens and grotto-heavens.
This innate ability was extraordinarily formidable.
Beyond the Primeval Nine Heavens stood incomparably dense Heavenly Qi Walls. Grotto-heavens rested within the sky; unless they took the initiative to reveal themselves, they were extremely difficult to detect from the outside world.
But as long as an Upper Extreme Heavenly Eagle had been somewhere before, it could follow its instincts, pierce through space, and travel back and forth again.
It was itself a Primeval Ancient Beast with Rank 8 battle strength and an extremely fast flying speed. For Hei Fan to find such an Upper Extreme Heavenly Eagle egg, he must have paid an enormous price unless he had encountered a fortunate opportunity.
The Upper Extreme Heavenly Eagle's only flaw was likely its lifespan.
Its lifespan was only eighty years.
Even ordinary mortals lived for a hundred years.
For a dignified Primeval Ancient Beast, the Upper Extreme Heavenly Eagle's lifespan was actually inferior to that of mortals. It truly lowered its standing somewhat. Other Primeval Ancient Beasts lived for hundreds of thousands of years at a time, even several hundred thousand years; the Upper Extreme Heavenly Eagle simply could not compare.
However, it also had a method of continuing its life.
Before dying naturally of old age, it would lay an egg.
This egg contained all of its past memories, even the Space Dao Marks it had accumulated throughout its life.
When the hatchling broke from its shell, the Upper Extreme Heavenly Eagle would return