Yerin raised one finger.
"The first theory is called the Mana Density Shift Theory," she paused for a moment, recalling what she had read. "Over the years, many mages and researchers have visited Vazrun Island to study its strange nights. They recorded the ambient mana at different times of the day and found something unusual."
She looked around at the group.
"Every time night falls, the mana surrounding the island undergoes a dramatic shift. It doesn't simply become denser. Its composition, how would I say it, changes."
Horren frowned.
"…Composition?"
Yerin nodded.
"Ordinary mana, or what we called it Raw mana is stable and naturally resonates with the environment. But the mana here begins exhibiting properties unlike anything found elsewhere during night time. It becomes heavy, denser, radiates unsettling pressure, and inert or unstable to magical observation, almost… almost as though another type of mana is gradually replacing it."
She continued,
