Environmental Camouflage (環境迷彩 Kankyō Meisai) is, strictly speaking, not a magic spell but a biological function of Garyu, to generate with his mana a field around himself to hide his appearance, assimilating with the darkness. It is highly effective at dim places, whilst at bright places the field would be easily visible. In StrikerS, Garyu uses it to hide himself before attacking the Forward Team in the underground sewers.