Modifier
spear_prophet_modifier
The modifier spear_prophet_modifier is a named modifier in Crusader Kings III; the game gives it no name. It gives Court grandeur baseline +6, Monthly Piety per Knight +3%, Levy Reinforcement Rate (Same Faith) +50%, Clan Ruler of Same Faith Opinion +5, Knight Effectiveness +20%. No add_…_modifier command in common/, events/ or history/ adds it. Patch 1.20.1.2, from game/common/modifiers/00_historical_artifact_modifiers.txt.
Effects
Where the game adds it
No add_…_modifier command in common/, events/ or history/ adds it.
Source: game/common/modifiers/00_historical_artifact_modifiers.txt (line 91), the English localisation (spear_prophet_modifier, spear_prophet_modifier_desc) and every add_…_modifier / remove_…_modifier in common/, events/ and history/, Crusader Kings III 1.20.1.2.