Shang was still visible, but the tortoise couldn't sense him.
That was because Shang had used the Light and Darkness Concepts to hide from Spirit Senses.
Yet, if one had eyes, they would still be able to see him.
But since the true tortoise was buried inside the thick layer of armor, it couldn't look at Shang with its actual eyes.
This essentially made Shang invisible to the tortoise.
At least until it somehow managed to look at the real world with its eyes.
And if it did that, Shang would very quickly realize where the real tortoise was.
The pressure on Shang's back reduced by a lot, but he still had to avoid the projectiles.
In a certain way, avoiding the projectiles now became even more draining on his concentration since he couldn't anticipate a projectile's trajectory anymore. After all, it was random.
But Shang still preferred it this way.
