This spell is most often used as an adjunct to the distort life, ritual of twaining, and similar spells related to magical breeding. It gives the wizard a 10% per level chance to divine the exact nature of one “aspect" of a creature under inspection. (An “aspect" is a creature characteristic chosen by the caster: size, coloring, a detail of external or internal structure, a special ability, etc.) The subject must be held perfectly still so that the auras are stable to the inner eye. Any failed roll within 10% of success gives a wrong result; otherwise, it just fails.
The material component is an eagle's eye, which the wizard must swallow.
Notes: Very rare spell. (Updated from Imagine Magazine.)