The material below is Open Game Content from a 3PP Source
Aura moderate abjuration; CL 6th
Slot shield; Price 3,153 gp (plus the value of the scroll spell if one is currently scribed); Weight 5 lbs.
This +1 light wooden shield has a leather strip on the back on which a spellcaster can scribe a single spell as on a scroll. A spell so scribed requires half the normal cost in raw materials. The strip cannot accommodate spells of higher than 3rd level. The strip is reusable.
A random caster's shield has a 50% chance of having a single medium scroll spell on it. The spell is divine (01–80 on d%) or arcane (81–100). A caster's shield has a 5% arcane spell failure chance.
Requirements Craft Magic Arms and Armor, Scribe Scroll, creator must be at least 6th level; Cost 1,653 gp