It's a quest item that doesn't take up a slot. You have to talk to Eris once you have all three.

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muffhoundOP•

Right on thanks, thats what i figured. But after the exotic emblem fiasco when trials first started i figured id ask to get some peace of mind.

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questioncom•

nothing goes into your inventory for the quest.

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eliasgreyjoy•

It's not an actual item in your inventory. Check your quest page if you're to that step. Should be filled in.

1