Taken

The Taken are an enemy faction in Destiny.

Biology
The Taken are paracausal entities that were from various races and factions but later enslaved by the Hive god Oryx who corrupted them with the power of the Darkness. These poor creatures as enslaved both mind and body to serve Oryx the Taken King, making them mindless thralls that serve the Hive god.

According to a Warlock researcher named Asher Mir, the Taken emit large quantities of neutrinos when entering through the space-time continuum.

Source

 * Destiny: Taken King