Ioun Stone of Reserve

While this vibrant purple prism orbits your head,
it stores spells cast into it, holding them until you
use them. The stone can store up to 3 levels
worth of spells at a time. The spell uses the slot
level, spell save DC, spell attack bonus, and
spellcasting ability of the original caster.
{c}AC 24; 10 HP; Resistance to all damage.
{c}DC 24 Acrobatics to steal
Silence and reserve will give anyone a reputation
for wisdom.