mandala_upgrade_increment_of_peace_effect

mandala_upgrade_increment_of_peace_effect = {
	if = { 
		limit = { has_variable = mandala_house_power_accumulated_increments_of_peace }
		change_variable = {
			name = mandala_house_power_accumulated_increments_of_peace
			add = 1
		}
		hidden_effect = {
			remove_character_modifier = mandala_increments_of_peace_modifier
			send_interface_message = {
				type = msg_mandala_good_with_text
				title = mandala_increments_of_peace_accumulated
				desc = mandala_increments_of_peace_accumulated_desc
				left_icon = root
				add_character_modifier = { modifier = mandala_increments_of_peace_modifier }
			}
		}
	}
}

As written in game/common/scripted_effects/tgp_mandala_scripted_effects.txt.