Don't complete it until the DLC releases!!
Planet Destiny confirmed that when you turn in an exotic bounty after the release you will receive the version 2.0 of that weapon!!
You won't need to waste your shards to upgrade it!
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Edited by Noble: 12/7/2014 4:28:52 AMI didn't think of this until earlier today, I had just finished thorn on Thursday. Too bad! I should have paid more attention to deej...