Cutting

Alex moved away from the location with the space aura and went outside where he couldn't feel space at all.

He was still capable of using the dao to teleport, so he did so and appeared quite a bit far away.

He called out both Pearl and Whisker in this location with barely any aura or intent and had the two of them train by themselves, while he trained on his own thing.

Alex then brought out a sword, his sword, and prepared himself. He closed his eyes and visualized cutting space to open the crack.

The act of cutting, the act of separating one thing into many was something Alex clearly understood. That was how he learned the Dao in the first place.

However, to cut something, he didn't just need to know how to cut but also what he was cutting. And as of yet, he didn't entirely understand space as an entity, or otherwise, he would've already gained a Dao.