Years and years passed by. The dark creatures were still spawning nonstop. Not giving Cairo any time for rest at all
The dark creatures were even getting stronger and stronger over time. Fortunately, their current strength is still far from being able to harm Cairo
To make sure that he at least has some time for defense, Cairo will sometimes make a protective dome of sands around him
The sand dome was so durable that even thousands of attacks weren't able to destroy it. Cairo uses the time he has brought to himself to rest
If not, even before the hundred years passed, he might die already because of so much fatigue
Not to mention, with the dark creatures getting stronger anytime, Cairo can't afford to let himself get weakened
How can Cairo survive when he was weakening while his enemies are getting stronger?