"As you should know, a Spirit Domain allows the user to perceive his surroundings in minute detail, from the smallest fluctuation of the winds to even a molecular level." Zariel began as the sun kissed the horizon. "However, did you know you are capable of masking your existence from other people's domain?"
"Aurelia knew that."
"I know you know that. Now let me finish," he continued. "Such a basic concept should have been taught long ago. No, today we will discuss the manipulation of how to create faints when you fight using the spirit."
"Professor," Said Byleth. "Can we have an example?"
Just then, the hairs rose on the back of his neck. Perspiration dotted his brow, staining his tunic, as he whirled toward the source, startled at the gaping nothingness of the empty training hall. By the time he turned back, Zariel had walked towards him, pressing a single finger on his throat.