Tier 5

Emery was on the boundary between the dark, outer space and the Hyperion planet.

After only a few hours of cultivating in the place called the Zero Abyss, his chest heaved up and down as he began to gasp for air.

Emery discovered that the situation in him cultivating in this place was not the least bit similar to his time in deep water. 

With the help of a [Water Breathing] spell, he could keep the air in his lungs and stay under for days. The only uncomfortable thing that he had to endure was the crushing pressure that the deepwater imposed upon his body.

As for this place, however, it was like a vacuum space that sucked out the air within. It didn't even let a wisp exist for more than a few moments. It was suffocating.

Hence Emery had to learn a way, a method in order to breathe from such a thin, almost nonexistent air and eventually adapt to the place.