Staff of Defense

This Staff of Defense is slender and hollow and made entirely of glass, yet it is as strong as oak.
{1} You have +1 to AC
{2} The staff has 10 charges (recharged 1d6+4 per
dawn) that can be used for mage armor (1 charge)
or shield (2 charges) if these spells are on your
class's spell list.
{3} If the staff's last charge is expended, roll a d20.
On a 1, the staff shatters and is destroyed.
{4} Quarterstaff | 1d6 bludgeoning | 4 lbs Versatile