One visible willing target per character level is biologically altered to withstand a particular set of environmental conditions, the entire group of alterations counting as a single Change. The altered subject can survive any specific chosen natural environment, whether deep space, the surface of a molten planet, or the airless pressures of a sub-sea trench. These alterations do not protect the target from energies intentionally used to harm them; thus, protection from a flaming hell-world won’t protect the user from being hurt by a flamethrower. Adapted subjects do not need to eat, drink, or breathe while so altered. The adaptations last as long as the Change is supported, and then fade in one hour per caster level. Alterations are not usually externally visible, but can be easily detected on closer inspection. [CotBS pg 78]