My advice. Put in the ghorn free promotional CoDe on bungie.net code redemption. Thats what I did, I grinded since January and I had everything but the gally. I put in the code and two days later I get one from gorgons. Then just this week another from nf. Trust me this works. My buddy luda got it days after putting in the code and he's had the game for two weeks. Its literally rng but I find you get the same thing if you've had it once so getting the grim card helps get you another drop.