Stone Familiar

This life-sized carving of a Tiny animal is crafted from dark, rough stone. It has a hardness of 8 and 20 hit points. A witch can use the stone familiar to store up to 500 levels of spells (cantrips count as 1/2 level for this purpose). A witch can use the stone familiar to teach her living familiar any spells stored in it, and vice versa. A witch who identifies a stone familiar immediately knows what spells are stored inside it. A stone familiar is never found as randomly generated treasure with spells already stored in it.