The Art of Destroy Talisman was created through a collective effort by the Entropy Coalition. It was one of their first experiments into using Chaos in the Dream. As is known, their last experiment brought the nightmares. They found an interesting way to meddle with talismans, and through the careful use of reweave and it's counterpart, could misshape a talisman. At the time, they also had a mad Elder DreamSmith with them. It was she who first thought of the idea. Using this Art, which they guarded jealously, the continued their experiments and used it to ever greater degrees. Eventually, they began to test it on the City Walls, with drastic results. The Art was thought lost after that, however it seems that at least one Lyran was a former member of the Entropy Coalition. It presumably then spread from there.