Twice recently I have scried or used Brainstorm to place cards atop my deck, and they have disappeared either while drawing on my main phase or from using Yuriko’s trigger. In the most recent game, I scried and placed Emrakul at the top of my deck, but drew an Island instead. This is even with the Emrakul art sitting in top position on my deck. It effectively entirely subverts the gameplay theme for this Commander.