From Destinypedia, the Destiny wiki
Species:
Fallen
Faction:
House of Dusk
Rank:
Major
Class:
Servitor
Mission:
Assassination Patrol
Weapon(s):
Servitor Eye
Abilities:
Summon Fallen Void Absorption shield High Durability Rapid Movement Midair Levitation Ether Shielding
The Taken Decayer are Servitors seen in the Salt Mines. Their Patrol can be picked up in Trostland, European Dead Zone.