The rewards I received were Queen's class item and the Feud Unfading shader, which looks pretty good, from Variks.
From Petra you get the BOOLEAN GEMINI. Yes the Taken King iteration of the 347 Vesta Dynasty is the end reward of the Wolves of Mars quest line. I will have it equipped on my titan for the foreseeable future.
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You need 2 defeat oryx before you can get the wolves of Mars quest