Is There a Difference Between Hoyd and the Shards?

"No good can come of two shards settling in one location," the letter says. "It was agreed that we would not interfere with one another." Yeo: It disappoints me that so few of the shards have kept to this original agreement. The author of the letter sees that as a violation of their original pact, or their original agreement. This leads me to believe that this might be the dragon frost a that we originally speculated was possibly one of the authors of the first letter.