Daily power from magical items: A magic item’s daily power can be used
once per day and is renewed when its user takes an
extended rest. As with daily powers provided by your
class, there is a limit to the number of magic item
daily powers you can use on any given day. This limit
depends on your level.
At 1st–10th level, you can use one magic item daily
power per day.
At 11th–20th level, you can use two magic item
daily powers per day.
At 21st–30th level, you can use three magic item
daily powers per day.
Each use of a magic item daily power must come
from a different magic item. At 11th level, for example,
you can use the daily powers provided by two different
magic items, but you can’t use two different daily
powers from the same magic item. Your character
sheet includes boxes to help you keep track of these
uses.
Each time you reach a milestone (see page 259), you
gain one additional use of a magic item daily power.
This benefit can be used to activate any magic item
daily power that you have not already used this day
(even if you’ve already used a different daily power
from that magic item).
After you take an extended rest, all of your magic
item daily powers are renewed, and you start fresh
with regard to the number of magic item daily powers
you can use per day.