The dome created by the formations didn't just have the ability to hide the shining lakes.
Elder Julia took her time to explain the features of the formations after the battlefield was cleaned, and the corpses of the magical beasts were stored.
The basins were an extremely efficient device that became self-sufficient once they were activated entirely.
The formations activated the innate capabilities of the terrain that made the surface of the basins and initiated the accumulation of "Breath", which was then stored in the form of shining water.
Yet, the accumulation didn't stop when the basins were full.
Elder Julia and the other experts had made many tests and calculations to find a balance between the expenditure of "Breath" and its accumulation so that the basins could function continuously without incurring in an overflow.