Within the Ancient Secret Scripture, Anvis watched everything in the outside world, his heart without any fluctuation.
The appearance of that column of light was an emergency alert he had pre-set in Silver.
The moment he left Fiona's room involuntarily, that beam of light would be simultaneously triggered, activating the school's Mystery Lock defense mechanism.
This would force the enemy to make a choice.
Whether to immediately escape with the important target 'Fiona', or to take the risk of being discovered and besieged by a Ninth Rank Mage of the academy, forcefully making a move on another target, 'Anvis'.
The appearance of this column of light meant that his arrival had already been discovered.
Meanwhile, there are likely other defense measures inside the house.
It was a simple psychological trick: a 100% chance of getting eighty dollars, versus an 80% chance of getting a hundred dollars, most people would choose the former.
