Either Matoya chose to be vague on purpose or simply enjoyed ignoring the questions at hand for what she decided her visitors needed to know. There were questions, and then there were questions behind questions. The ones that followed deviated from their stated purpose.

"Mist is created by the disruption of the flow of souls back to Gaia, it is stagnant souls not allowed to be at peace. The purpose, to remove all souls from Gaia, to make room for Terra to take over. Garland is the overseer of this process. Five hundred years ago, he attempted to shortcut the process, and failed. His newest failure stands before me."