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From Pathfinder Impossible Magic, which isn't enabled.

Continuum Staff

ITEM 16
UNCOMMONMAGICALSTAFFTWO-HAND-D8
Price 9500 gp
Usage held in 1 hand
Bulk 1
Category simple
Group club
Damage 1d4 bludgeoning

A looped band of copper, winding in on itself, sits atop the head of this shiny metal staff. The staff's surface seems to warp unpredictably when viewed, the reflections across the shiny surface of its length never forming the same pattern twice.

Activate—Restitch Time (fortune, manipulate)
Frequency once per day
Trigger You would fail or critically fail an attack roll, saving throw, or skill check
Effect You briefly reverse time to fix your error. Reroll the triggering check, taking the better of the two results.
Activate Cast a Spell
Effect You expend a number of charges from the staff to cast a spell from its list.
Craft Requirements Supply one casting of all listed ranks of all listed spells.
Pathfinder Impossible MagicORC