The Hive Acolyte. Above is the Blood of Oryx variant.

Hidden Swarm:
Silent Brood:
Spawn of Crota
Venom of Oryx
Generic

"Belief is a powerful weapon."

It would be a mistake to view the Hive's Acolytes as foot soldiers,
because the Hive is not merely an army, it is a dark force rising. It is
belief and horror, and its Acolytes are its instruments, hungry to
commit the atrocities that will drive their own ascension.

Source:http://db.destinytracker.com/grimoire/enemies/hive/acolyte

UPDATE 1/11/22 - Added Venom of Oryx variant

UPDATE 6/30/22 - Added Generic variant

UPDATE 8/16/22 - Darkened skin for Generic variant