Mortal Initiates
Concept · Stellaris 4.5.2
Mortal Initiates in the Stellaris encyclopedia: … are Adminstrator Jobs produce Unity, Society Research, and Amenities
Mortal Initiates 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.
… are Adminstrator Jobs produce Unity, Society Research, and 
Amenities
These most devout pupils of their faith dedicate the remaining portion of their lives to the betterment of their society - a study which concludes with their willing, fatal sacrifice.
Source: common/game_concepts (concept_mortal_initiate) and localisation/english, Stellaris Cygnus v4.5.2 (9776).