Black Tortoise's shell had already been refined by him into the hardest object in the Primordial World.
This was absolutely beyond imagination. It was the first time the Grand Dao Script had introduced something that had reached such an extreme.
Moreover, once Black Tortoise's Celestial Record was cultivated to a profound realm, it could reach the level of a Grand Dao Sage.
Who would not envy such a bizarre cultivation technique?
One only needed to sleep to grow stronger. It truly made everyone green with envy.
Black Tortoise was now ranked above Yuanshi Tianzun on the combat power rankings.
Did that mean Yuanshi Tianzun's Pangu Banner would likewise find it difficult to break through his defenses?
One had to know that Yuanshi Tianzun's Pangu Banner had been formed from the blade of the Heaven-Opening Axe.
Legend had it that, as an instrument of slaughter, it was no weaker than the Heaven-Opening Axe.
It was also the most murderous of the Three Treasures of Creation.
Such a treasure was clearly incomparably powerful.
Yet Yuanshi Tianzun, who possessed this treasure, was ranked below Black Tortoise.
What did that mean?
It meant that even the Pangu Banner, formed from the blade of the Heaven-Opening Axe, would have great difficulty breaking through Black Tortoise's defenses.
If that was truly the case, then this matter was worth pondering over.
This treasure truly had little means of dealing with Black Tortoise.
After all, Black Tortoise surpassed Yuanshi Tianzun in combat power.
At the very least, it proved that in Yuanshi Tianzun's hands, the Pangu Banner could not break Black Tortoise's defenses.
This was indeed rather unimaginable.
Not only did he possess a cultivation technique that let him grow stronger while sleeping, but that technique specialized in defense.
This was undoubtedly the finest treasure in the world.