When you get a Ghallahorn from nightfall then one from Crota and then a third from crucible but already have one since start of game lol
Guardians post you're most bizarre Ghallahorn find
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Been playing from day 1, no Gjallarhorn yet. Finished Nightfall yesterday and got Icebreaker. Already have it. I'll keep trying for the Gjallarhorn. Did one time play a Rock Strike and my team mate got a purple or blue heavy engram, he took it to the Tower Cryptarch who in turn decrypted it into the Gjallarhorn. The Doctor said it will take a while for my ear drums to recover and for me to gain my hearing back. I did confirm it was fresh Gjallarhorn when he equipped it and I inspected his character, his Gjallahorn did not have any experience levels. He could have been messing with me by pulling one out of the vault or equipping and extra one he had. Who knows....