Staff of Defense

(Requires attunement.) While holding the staff,
you have a +1 bonus to your AC. The staff has
10 charges (O) which can be expended using an
action to cast the following spells:
O: mage armor Charges: OOOOO
OO: shield OOOOO
The staff regains 1d6 + 4 expended charges each
day at dawn. If you expend the last charge, roll a
d20. On a 1, the staff shatters and is destroyed.