Okay, so far my destiny exp in the April update has been great; i got the zen meteor when the update dropped and got more and more exotics through 3oC but for the the past few weeks I've been running low on shards and i can't dismantle the exotics i have because i still use them unless i get one the 3oC and it's a lower light then i get a shard but it gets immediately used. So, in my opinion i think xur selling the exotic shards is a good plus why the hell do we need to buy motes of light from him in the first place if we could easily level up and get 5 of them.
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I know everyone says do the kiosk thing but to me that sounds stupid as hell buying a gun to level up just to get two shards, it might be effective but sounds idiotic if you think about what you're doing.