The character taps energy from the Plane of Shadow to cast a
quasi-real, illusory version of a wizard or sorcerer evocation of
4th level or lower. (For a spell with more than one level, use
the best one applicable to the character.) For example, this
spell can be magic missile, fireball, lightning bolt, or so on.
If recognized as a shadow evocation, a damaging spell deals only
one-fifth normal damage. Regardless of the result of the save to
disbelieve, affected creatures are also allowed any save the
spell being simulated allows, but set the save DC according to
shadow magics level (5th) rather than the spells
normal level. Nondamaging effects (such as webs
ensnarement) have no effect when the shadow magic is recognized
as mostly illusory.