In Destiny, Grimoire cards are collectible cards that give typically receive during missions, and not only give you some glimmer, but also a little bit of back story to the world of Destiny.
There are also some hidden grimoire cards that can be collected by using some codes on the Destiny redemption page.
Simply sign in, or sign up for a Bungie account, and then redeem the codes listed below to unlock the grimoire card.
There are seventeen grimoire cards that can be redeedmed this way, so make sure to unlock them all.
Class: Hunter – MVD-4N3-NKH
Class: Titan – 3DA-P4X-F6A
Class: Warlock – YKA-RJG-MH9
Destination: Cosmodrome – HDX-ALM-V4K
Destination: Shattered Coast, Venus – 6A7-7NP-3X7
Destination: The Ocean of Storms, Moon – JMR-LFN-4A3
Destination: The Tower – 69P-KRM-JJA
Destination: Valley of Kings, Mars – 69R-DDD-FCP
Enemy: Cabal – 69X-DJN-74V
Enemy: Hive – 473-MXR-3X9
Enemy: The Fallen – 69R-F99-AXG
Exotic: Gjallarhorn – HC3-H44-DKC
Exotic: Red Death – 69R-VL7-J6A
Exotic: The Last Word – 69P-VCH-337
Fallen: Riksis, Devil Archon – TCN-HCD-TGY
Hive: Ogre – 69R-CKD-X7L
Vex: Minotaur – 6A9-DTG-YGN
Check my other guide for more redeemable unlocks in Destiny.