add_scaled_artifact_modifier_rulership_effect

add_scaled_artifact_modifier_rulership_effect = {
	random_list = {
		# Vassal Limit
		20 = {
			modifier = {
				exists = scope:inspiration_owner
				scope:inspiration_owner = { has_variable = chosen_vassals_mod }
				add = 160
			}
			if = {
				limit = { rarity = common }
				random_list = {
					20 = {
						add_artifact_modifier = artifact_vassal_limit_1_modifier
					}
					10 = {
						add_artifact_modifier = artifact_vassal_limit_2_modifier
					}
				}
			}
			else_if = {
				limit = { rarity = masterwork }
				random_list = {
					20 = {
						add_artifact_modifier = artifact_vassal_limit_3_modifier
					}
					10 = {
						add_artifact_modifier = artifact_vassal_limit_4_modifier
					}
				}
			}
			else_if = {
				limit = { rarity = famed }
				random_list = {
					20 = {
						add_artifact_modifier = artifact_vassal_limit_5_modifier
					}
					10 = {
						add_artifact_modifier = artifact_vassal_limit_6_modifier
					}
				}
			}
			else_if = {
				limit = { rarity = illustrious }
				random_list = {
					20 = {
						add_artifact_modifier = artifact_vassal_limit_7_modifier
					}
					10 = {
						add_artifact_modifier = artifact_vassal_limit_8_modifier
					}
				}
			}
		}

		# Powerful Vassal Opinion
		20 = {
			trigger = {
				scope:inspiration_owner ?= { 
					NOT = { government_has_flag = no_powerful_vassals }
				}
			}
			modifier = {
				exists = scope:inspiration_owner
				scope:inspiration_owner = { has_variable = chosen_vassals_mod }
				add = 160
			}
			if = {
				limit = { rarity = common }
				random_list = {
					20 = {
						add_artifact_modifier = artifact_powerful_vassal_opinion_1_modifier
					}
					10 = {
						add_artifact_modifier = artifact_powerful_vassal_opinion_2_modifier
					}
				}
			}
			else_if = {
				limit = { rarity = masterwork }
				random_list = {
					20 = {
						add_artifact_modifier = artifact_powerful_vassal_opinion_3_modifier
					}
					10 = {
						add_artifact_modifier = artifact_powerful_vassal_opinion_4_modifier
					}
				}
			}
			else_if = {
				limit = { rarity = famed }
				random_list = {
					20 = {
						add_artifact_modifier = artifact_powerful_vassal_opinion_5_modifier
					}
					10 = {
						add_artifact_modifier = artifact_powerful_vassal_opinion_6_modifier
					}
				}
			}
			else_if = {
				limit = { rarity = illustrious }
				random_list = {
					20 = {
						add_artifact_modifier = artifact_powerful_vassal_opinion_7_modifier
					}
					10 = {
						add_artifact_modifier = artifact_powerful_vassal_opinion_8_modifier
					}
				}
			}
		}

		# courtly_opinion
		20 = {
			modifier = {
				exists = scope:inspiration_owner
				scope:inspiration_owner = { has_variable = chosen_vassals_mod }
				add = 160
			}

As written in game/common/scripted_effects/00_ep1_artifact_creation_effects.txt.