i did trials 2 times first try 5-0, then i got wrecked. second try i went 9-2. And i still got no emblem.
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It's random
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U can get basic emblems as random drops in ToO. If you are talking about the exotic emblem then you can only get it by going flawless 9-0 and picking it up at the Lighthouse chest.
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You get the exotic emblem from the lighthouse, where you haven't been.