create_artifact_wall_shield_effect

create_artifact_wall_shield_effect = {
	$OWNER$ = { save_scope_as = owner }
	$TARGET$ = { save_scope_as = target }
	$CREATOR$ = { save_scope_as = smith }
	
	hidden_effect_new_object = {
		get_artifact_quality_effect = yes
		get_artifact_wealth_effect = yes
		
		if = {
			limit = {
				scope:smith = { artifact_use_mediterranean_building_visuals_trigger = yes }
			}
			scope:owner = {
				create_artifact = {
					name = artifact_wall_shield_name
					creator = scope:smith
					description = artifact_wall_shield_description
					visuals = wall_shield_medi
					visuals_source = scope:target
					type = wall_shield_special
					modifier = artifact_placeholder_modifier
					save_scope_as = newly_created_artifact
					wealth = scope:wealth
					quality = scope:quality
					#decaying = no
				}
			}
		}
		else = {
			scope:owner = {
				create_artifact = {
					name = artifact_wall_shield_name
					creator = scope:smith
					description = artifact_wall_shield_description
					visuals = wall_shield
					visuals_source = scope:target
					type = wall_shield
					modifier = artifact_placeholder_modifier
					save_scope_as = newly_created_artifact
					wealth = scope:wealth
					quality = scope:quality
					#decaying = no
				}
			}
		}
		scope:newly_created_artifact = {
			add_scaled_artifact_modifier_grandeur_small_effect = yes
			add_scaled_artifact_modifier_dynasty_prestige_effect = yes
			if = {
				limit = {
					OR = {
						rarity = famed
						rarity = illustrious
					}
				}
				add_scaled_artifact_modifier_minor_prestige_effect = yes
			}
			remove_artifact_modifier = artifact_placeholder_modifier
		}
	}
}

As written in game/common/scripted_effects/01_ep1_court_artifact_creation_effects.txt.