From Destinypedia, the Destiny wiki
Plentiful Centurions are a type of Blood Guard Cabal Centurion that are encountered in the Gambit, and Gambit Prime when it was still playable, serving as High-Value Targets. They wear the same armor as other Blood Guard members, but with a shining, white aura that makes them stand out.
Plentiful Centurions can be found when playing a match of Gambit against the Cabal, who are fought on the Emerald Coast, Legion's Folly and New Arcadia maps. They will only appear once per match, so you and your Fireteam will have one shot at eliminating them before they are gone.
Not long into the match, the Drifter will announce that a High-Value Target is on the field. Once they have arrived, they will begin to quickly make their way to the opposite side of the map. Players will have a limited time to the kill them before they reach their destination. If this happens, the Drifter will say that they target is preparing to depart, and you will only have a few seconds left to kill them before they despawn. Although the target has a large amount of health, they will bleed Motes of Dark as they take damage, and if you are successful in killing them, they will drop a substantial amount of Motes.
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