"We haven't," he says, equally thoughtful. "If I was able to channel it into the talisman before, however poorly, then I think it ought to work. Though I wonder how the paper will react to prolonged exposure to undiluted thanergy."

And considering talisman paper is crafted for the specific purpose of storing and channeling spiritual -- or resentful -- energy, Wei Wuxian doubts they could simply replace it with the flimsy of Harrow's world.