Blessed Palms (3.5e Equipment)
From D&D Wiki
Blessed Palms: These beautifully crafted mithril gauntlets are light and seem to support somatic motion rather than impede it. Blessed palms can be used as a divine focus in connotation with a good aligned deity. When worn by a divine spellcaster reverent of such a god, the blessed palms bestow one extra divine spell slot of every spell level from 1 to 9.
When an evil creature wears the gauntlets, it does not gain the extra spell slots, but incurs 5 negative levels that remain as long as they are worn. Creatures of neutral alignment (with respect to Good and Evil) receive neither benefits nor penalties from wearing the palms.