extort_subjects_effect

extort_subjects_effect = {
	random_list = {
		10 = { # A Powerful Vassal
			trigger = {
				any_powerful_vassal = {
					extortion_powerful_vassal_trigger = yes
				}
			}
			save_temporary_scope_value_as = {
				name = found_suitable_target
				value = yes
			}
			random_powerful_vassal = {
				limit = {
					extortion_powerful_vassal_trigger = yes
				}
				save_scope_as = extortion_target
			}
			trigger_event = subject_extortion.0001
		}
		5 = { # A County
			trigger = {
				is_ai = no # So that this doesn't wreak havoc in the player's realm
				any_held_title = {
					extortion_county_trigger = yes
				}
			}
			save_temporary_scope_value_as = {
				name = found_suitable_target
				value = yes
			}
			random_held_title = {
				limit = {
					extortion_county_trigger = yes
				}
				save_scope_as = extortion_target
			}
			trigger_event = subject_extortion.0002
		}
		10 = { # Theocratic Vassals
			trigger = {
				NOR = { has_character_flag = recently_extorted_theocratic_vassals }
				any_vassal = {
					extortion_theocratic_vassal_trigger = yes
				}
			}
			save_temporary_scope_value_as = {
				name = found_suitable_target
				value = yes
			}
			random_vassal = {
				limit = {
					extortion_theocratic_vassal_trigger = yes
				}
				save_scope_as = extortion_target
			}
			trigger_event = subject_extortion.0003
		}
		5 = { # Vassals at Large
			trigger = {
				NOT = { has_character_flag = recently_extorted_vassals_at_large }
				any_vassal = {
					extortion_vassal_at_large_trigger = yes
				}
			}
			save_temporary_scope_value_as = {
				name = found_suitable_target
				value = yes
			}
			random_vassal = {
				limit = {
					is_powerful_vassal = no
					extortion_vassal_at_large_trigger = yes
				}
				alternative_limit = {
					extortion_vassal_at_large_trigger = yes
				}
				save_scope_as = extortion_target
			}
			trigger_event = subject_extortion.0004
		}
		5 = { # Courtiers
			trigger = {
				NOT = { has_character_flag = recently_extorted_courtiers }
				any_courtier = {
					extortion_courtier_representative_trigger = yes
				}
			}
			save_temporary_scope_value_as = {
				name = found_suitable_target
				value = yes
			}
			random_courtier = {
				limit = {
					extortion_courtier_representative_trigger = yes
				}
				save_scope_as = extortion_target
			}
			trigger_event = subject_extortion.0005
		}
	}

	# Fallback in case no-one could be found
	if = {
		limit = {
			NOT = { exists = scope:found_suitable_target }
		}
		trigger_event = subject_extortion.9998
	}
}

As written in game/common/scripted_effects/00_stewardship_perk_effects.txt.