destroy_the_magi_scripted_effect

destroy_the_magi_scripted_effect = {

	add_heresiarch_trait_effect = yes

	religion = { save_scope_as = root_religion }

	faith = {
		change_fervor = {
			value = major_fervor_gain
			desc = fervor_gain_magi_destroyed
		}
		if = {
			limit = {
				has_doctrine = doctrine_spiritual_head
				main_rite = { rite_has_doctrine = doctrine_theocracy_temporal }
			}
			custom_tooltip = replace_the_high_priest_effect_tooltip
			hidden_effect = {
				remove_doctrine = doctrine_spiritual_head
				add_doctrine = doctrine_no_head 		
			}
		}
	}
			

	if = {
		limit = {
			AND = {
				root.religion = religion:zoroastrianism_religion
				OR = {
					has_faith = faith:mazdakism
					has_faith = faith:zurvanism 
				}
			}
		}
		add_prestige = massive_prestige_gain 
	}

 	custom_tooltip = destroy_the_magi_opinion_tooltip 
	hidden_effect = {
 		every_ruler = {
			if = {
				limit = {
					AND = {
						NOR = {
							has_faith = faith:mazdakism
							has_faith = faith:zurvanism 
						}
						religion = religion:zoroastrianism_religion
					}				
				}
				add_opinion = {
					target = root
					modifier = fp3_spawn_of_ahriman_opinion
				}
			}
			else_if = {
				limit = {
					rite = { rite_has_doctrine = doctrine_major_branch_behdin }
				}
				add_opinion = {
					target = root
					modifier = fp3_abolished_priesthood_opinion
				}
			}	
		}
	}	
}

As written in game/common/scripted_effects/01_dlc_fp3_scripted_effects.txt.