Blazing Harbinger
Blazing Harbinger in the Stellaris encyclopedia: Blazing Harbingers replace Politicians on planets with Habitability lower than 50%. They turn Consumer Goods into Unity and Amenities and Stability.
Blazing Harbinger in the game's words
The encyclopedia entry as the game shows it in its tooltips; underlined words open their own entry or page here.
Blazing Harbingers replace 
Politicians on planets with Habitability lower than 50%. They turn Consumer Goods into 
Unity and Amenities and Stability.
Revered as both visionaries and leaders, these harbingers unite faith and authority. Through sacred flame, they guide the empire toward its destined radiance.
Source: common/game_concepts (concept_inf_blazing_harbinger, also concept_inf_blazing_harbingers) and localisation/english, Stellaris Cygnus v4.5.2 (9776).