Rainbow Shield

This spell envelops the caster or a touched and willing spell recipient in a glowing aura of swirling colors. Though its hues are ever-shifting, the overall color of the aura corresponds to the caster's mood (purple for despair, yellow for nausea, red for anger, black for pain, blue for happiness, green for affection and friendliness, and white for pride, exultation, or manifesting magical power).

Though the rainbow shield has been used just to impress gullible observers, its purpose is to defend its wearer in combination with another spell.

This second spell must be of 3rd level or less. The spell is cast into the shield and is absorbed. Thereafter, until the shield fades away at spell expiration, the effects of the protector spell (typically fireball or lightning bolt) are visited on anyone seeking to strike at or through the shield. Normal saving throws against the protector spell, if any, still apply.

Though the rainbow shield only affects creatures making direct physical attacks (not missile or magical attacks), it can inflict full damage (or spell effects) once per round upon each attacker, as often as there are invaders to deal with, even if several creatures attack simultaneously. The protector spell becomes part of the rainbow shield and fades away when the shield docs; its own duration is ignored.

The material component of this spell is an iridescent shell, such as polished abalone.