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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Does anyone know when Petra gives u the lost and found quest? I've doNE both variks and petras quests but this hasn't come up yet. Do u need to be a certain rank??