Line of Silencing

The line of silencing is one of the new lines invented by joel's father, Trent Saxon, and its function was not revealed until near the ending of the book. The function of the line is, as the name suggests, to absorb sound. The louder the sound is, E.g. a scream, the more it is dampened, whilst a whisper is basically unaffected. The line of silencing is unique from the other lines because it appears to have no practical use in Nebrask or in duels and that it will stop working after a given time.