I spent nearly all my motes rolling my timurs lash, only to find out xur was selling a chest engram the next day :/. Starting from a pathetic nine motes I went on a tear to earn more. When it was all said and done I had enough to buy only one---ONE engram. After telling everyone in my party chat to wish me luck, I turned it into the cryptarch and there it was...Heart of Praxic Fire!!!!