Did the nightfall for the first time. Got shards but was pumped because I needed them and was newish to the game. Had a friend who was doing nightfall, needed a third. Jumped in to help. Nightfall finished, they both get exotics and complain that they are duplicates (plan c and ice breaker). The only exotics I had seen were the handful of worked my tail off on bounties to get. I of course got nothing, since I'd already done the nightfall (or got shards if you want to count the first time).