The Shield of the Sun

The Shield of the Sun
Aura strong abjuration; CL 20th
Slot none; Weight 2 lbs.
Description
This +5 large shield, emblazoned with the symbol of the sun, allows the wielder to cast spells as if she were a 20th-level paladin with a Charisma of 20. The spells gained are cumulative with any existing spells per day the character might have, even from paladin class levels. The Shield of the Sun also grants its wielder spell resistance 15. It absorbs the first 10 points of damage from any energy attack (fire, cold, acid, electricity, or sonic). In return for all this, once per year the shield's owner must undertake a quest at the behest of a lawful good deity (no saving throw to avoid).
A chaotic or evil character gains four negative levels when wielding the Shield of the Sun. The negative levels persist as long as the shield is in hand and cannot be overcome in any way (including restoration spells). The negative levels disappear when the shield is stowed or leaves the wearer's possession.
Destruction
The Shield of the Sun may be destroyed if a good-aligned character casts it into the Well of Eternal Night, its light fading into the inky depths before it finally disappears. If a nongood character does the deed, the shield is not destroyed, merely lost, and a quest to the Plane of Shadow may recover it.