Finding deactivated ghosts and getting grimmor cards does the same thing that you are talking about.
English
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Yes, but they don't tell your guardian a thing.
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In the beta you could not read most of the grimmor cards. Ones you have unlocked will be readable in the full version of the game.
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Yea, verily I wish it so. The lore keepers of Destiny greatly desire such a thing.