Acolyte's Eye
From Destiny 1 Wiki
An Acolyte's Eye is a Taken construct summoned by Taken Acolytes. It acts as a long-range stationary turret, bombarding an enemy with a stream of energy. Acolyte's Eyes are fragile, requiring only little effort to destroy them, but their attacks are powerful enough to break an unwary Guardian's shield in seconds. They will remain in place even after the Taken Acolytes that summoned them are killed.