Here's the lore tab on Luna's Howl:
Josef opened the door. Shaxx filled the hallway beyond.
"You look like hell," said the Crucible Handler.
Josef scoffed. "Get out of here. I have Hive to hunt. No time for the Crucible today."
"Hive. You lost her on the Moon?"
Josef said nothing.
"You aren't the only Guardian to leave loved ones behind on that rock." Shaxx held out a long, lacquered box. "The Gunsmith asked me to deliver this personally."
"What's Banshee thinking? I can't afford this."
"I took care of it. Scavenged parts from my personal collection."
Josef considered it a moment.
"It's a good gun."
"She was a good wolf. This isn't a replacement. But it will help you finish your business with the Hive. Then I expect to see you back in the Crucible. We could use the inspiration."
I'm pretty excited to kill some hive on the moon with Luna's Howl. One thing stands out to me though... why the F was Josef walking his dog on the moon????
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He brought the wolf to fight with him. Guess he couldn’t find a dog sitter…