As Peter becomes a teenager, he begins the custom of bringing a glass of wine to his father before bed each night. Flagg decides to use this as a means of framing Peter. He dissolves a poison called "Dragon Sand" in a glass of wine and delivers it to the king after Peter leaves. Previously, in an attempt to win Thomas' friendship, Flagg had shown him a secret passage where Thomas could spy on his father. Unbeknownst to Flagg, when he delivers the poison, Thomas is watching through the glass eyes of the mounted head of Roland's greatest trophy, Niner the dragon. Flagg plants evidence incriminating Peter.