So did the nightfall and after dying a lot finshed the mission and got Ghorn which was bloody epic! But during the mission end timer I got disconnected with one of those stupid animal names like caterpillar, went back into the game and nightfall has come up finished which was great and got the grim card for ghorn but it's not in my inventory, went to tower no postmaster no nothing, so finally got it and not even fired one rocket from it :( and no way to get it back, I tried turning XBOX off and reloading but nothing So thanks cos I doubt il get it again :(