A Cieln シェルン, sherun?), miswritten as CIEL_N in the localized version of Ar nosurge: Ode to an Unborn Star, is a special type of Song Magic used in the Surge Concerto series that allows to make use of the facilities and functions of the Colony Ship Soreil. It could be said that they are equivalent to the Hymmnos Extracts from the Ar tonelico series.