Xur hasn't had exotic chest engrams for sale since week six. And he has never sold Heart of The Praxic Fire, as we all know. I have done every single nightfall strike and I have been saving my motes of light for months now, I have 95. Enough for four engrams, but I'm always disappointed to see that xur still doesn't have chest engrams. Bungie if you have any control over xur please put exotic chest engrams in his inventory soon. Anybody else have this problem? Let me know