I think this may have been fixed recently? I'm not totally sure but for the longest time I had noticed that no one had these impossible to get shaders and then out of nowhere through cryptarch packages I got God of War and Arctic Proxy. It also seems like I've seen an increased amount of people wearing God of War. Could be wrong but maybe the patched a bug?
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God of War is also obtainable through the Crucible. That's how I got mine in Year 1.
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God of war and Arctic proxy are year one shaders. They've been in the game since destiny released.