"...Now...memory...spell...blown cover..."
The fragmented and muffled voice echoed in Annan's ears.
It was like the sound of an old radio that isn't quite tuned to the station, filled with a lot of static.
——I hope they understand what I mean by knocking twice with my ring finger.
Annan thought.
Indeed, he could decipher from the current fragments of speech what Isaac wanted to communicate to him.
It was nothing more than information like "If you can hear, knock on the chair with your left index finger," or "Your memory is theoretically disrupted by a spell, be careful not to give yourself away." As long as Annan vaguely heard some snippets, he could infer the parts he didn't hear clearly by combining facts.
It was like doing an English listening exercise.
Especially here, where there weren't that many distractors.
By putting it in context, one could guess what Isaac meant.
But... that was just now.