Blood of Oryx is a Grimoire card from the original Destiny (Destiny 1), found under Enemies → Hive. Grimoire cards held most of the game's lore and were read on Bungie.net and in the companion app, not in the game itself.
Card text
Research into the cyphers and runes of the Hive leads the Cryptarchs to believe the Hive sects all serve one great master. The Blood of Oryx are feared to be the direct servants of this dark lord. The name Oryx appears too many times in Hive rituals to be ignored.
Grimoire text written by Bungie, shown as it appears in the Destiny 1 game files.