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Osirian Psybrids

were the term given by Imperial authorities to a race of highly psychic xenos. Glad in baroque armour containing ghastly barely-corporeal forms of mist, the Psybrids psychically traveled in hourglass-shaped vessels and mentally enslaved other species such as Humans and Orks. After inflicting severe losses on the early Ultramarines in the Osiris Rebellion during the Great Crusade, they were destroyed by Roboute Guilliman at the Battle of the Eurydice Terminal.

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