Demi-Shadow Magic

This spell is similar to the fifth level shadow magic spell (q.v.), but in addition to the quasi-real spells listed thereunder it enables the illusionist to cast a quasi-real wall of fire, wall of ice, or cloudkill. 

If recognized as demi-shadow magic (the victim makes its saving throw), the magic missile, fireball, et al. does 2 hit points of damage per level of experience of the spell caster, the wall spells cause 1-4 hit points of damage per level, and the cloudkill will slay only creatures with fewer than 2 hit dice.

This spell also allows the caster to tap a source of power as noted under shadow magic.