Check The Cave

Karl focused on his meditation while the last shift of the night ended, and the newly formed fourth space began to rapidly expand in his mind, absorbing everything that it could get, along with the lingering remnants of energy that Karl's blade had provided during the previous day's fight.

With the other three spaces waiting for their occupants to advance, and this fourth space being so small, the change was immediately obvious, and the enhancement of the focus was expanding the area much more efficiently than simply pouring energy into the space had. 

The Monks knew what they were doing for certain, and this was so far superior to trial and error that Karl felt silly for not having thought to ask them in the first place.

The others began to wake, and Karl could smell food cooking, so he shifted most of his focus to the outside world, and let the new space form naturally.