Previously, Amberser thought that the Dreamweave Barrier was a marvel of the Emerald Dream Forest.
Maintaining such a vast magical barrier must consume a vast amount of energy, and it was entirely due to Laine causing trouble that the Druids chose to operate in such an expensive and laborious way.
But when Amberser heard that the Dream Entering Ceremony also covered the entire Emerald Dream Forest, he had a guess.
The Dreamweave Barrier must have been adapted from the Dream Entering Ceremony.
The reason was simple, less hassle, cost saving, labor saving.
The Dream Entering Ceremony requires a preliminary password, probably a unique prayer script known only to the Druids, chant it, fall asleep, and you can enter the Natural Dreamscape.
The Dreamweave Barrier, however, simply causes one to fall asleep as soon as they enter its range.