If this were a game, the only ways to improve skill proficiency besides skill points would be through relentless practice.
Ever since his descent, Lin Xiao had been working nonstop, constantly digging and chiseling earth and stone. The technique he acquired from the Tower of Truth had become even more refined. He could now skillfully knock out clearly edged, square stones from the overall underground rock layer.
At first, the stones were very rough, their edges jagged and uneven as if haphazardly chiseled, and overall, they weren't squared.
Now, the edges of the stones had become somewhat smooth; though they still had minor bumps, at least they no longer cut the hand, as there were no sharp edges. Even the shapes had become distinct cubes, with the angles within a few degrees of perfect right angles, sitting steadily on the edge of the excavated tunnel, unlikely to topple.
When a person is completely focused on a task, time flies by, and efficiency is at its highest.
