The lines come from Warhammer 40,000: Darktide, Fatshark's 2022 co-operative action game set in the hive city of Tertium. In Warhammer 40K lore the phrase the Emperor protects is a common Imperial creed spoken by soldiers of the Astra Militarum, the vast human army often called the Imperial Guard. Players hear similar blessings and rallying cries during missions against heretics and monsters. Outside the game the clip spread through Warhammer fan edits and gaming soundboards because the pairing of faith and defiance sums up the Guard in seconds.