Destiny - New "Crimson Bonds" / Double Date full quest chain completion, "Crimson Crest" emblem quest completion and the reward, during the Crimson Days / Valentine's Day event. The quest is to completed 7 matches of the Crimson Doubles playlist. After completing it, you are rewarded with the "Crimson Crest" emblem.

It's pretty easy, not too much on how to obtain it.

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