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Josef opened the door. Shaxx filled the hallway beyond.
Luna's Howl is one of the two Crucible pinnacle weapons of the Forsaken expansion, and as such, takes dedication to obtain. It is in the Precision hand cannon archetype, but unlike other hand cannons in the archetype, it has a noticeably faster time to kill in Crucible. While it does not have the utility of Ace of Spades or its range, it is able to fell a Guardian in 0.67 seconds versus the 1 second time to kill that other Precision hand cannons have, provided you land all of your headshots. The gun has almost no recoil by virtue of its perks and its stability masterwork, but is lacking in range compared to its sibling pinnacle weapon, Not Forgotten, and it is recommended to pair Luna's Howl with a long range weapon such as a sniper rifle.
The main story with this weapon, is that there was a Guardian named Josef. He had a pet dog named Luna whom he was very close to. But, one day, he decided to go to the Moon to battle Hive. He brought Luna on the mission, but she was killed by them. He went through a lot of guilt after this, and in the end Shaxx had a gun crafted for Josef to help him get through his tough time.
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