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From Pathfinder #211: The Secret of Deathstalk Tower, which isn't enabled.

Wintershot

ITEM 15
UNIQUEDEADLY-D10MAGICALPROPULSIVE
Price 6500 gp
Usage held in 1+ hands
Bulk 1
Category martial
Group bow
Damage 1d6 piercing
Range 60 ft.
Reload 0

This +2 greater striking frost composite shortbow belonged to a legendary scout, Jelarial, who found herself in command of a company of elves fleeing Mierani north into the Crown of the World to escape the doom of Earthfall thousands of years ago. Wintershot resurfaced during the war to reclaim Kyonin from Tanglebriar several thousand years later, wielded by a succession of mysterious snipers whose movements through the woodland confounded the demons, so much so that it gave rise to rumors that Jelarial's ghost had returned to the south to aid her kin in a time of need.

When making a Strike with Wintershot, targets do not gain Concealment from the effects of mist or precipitation, and circumstance penalties to attacks of up to –2 imparted from strong winds are negated.

Activate—Auroral Shine (cold, concentrate, light, primal)
Frequency once per 10 minutes
Effect Fire an arrow at a target. If you hit, instead of dealing damage with the arrow, the creature struck must attempt a DC 34 Fortitude save.

Critical Success The creature is unaffected.

Success The creature is surrounded by shimmering lights akin to an aurora, causing it to become Dazzled for 2 rounds. If the creature was Invisible, it becomes Concealed instead. If the creature was already concealed for any other reason, it is no longer concealed.

Failure As success, but the creature also takes 2d6 persistent cold damage, and the light affects the creature for 1 minute.

Critical Failure As success, but the creature also takes 4d6 persistent cold damage, and the light affects the creature for 10 minutes.

Activate—Signal Flare (light, manipulate, primal)
Frequency once per day
Effect You pull back Wintershot's string and fire an arrow straight upward. The arrow soars to a height of 500 feet, or until it strikes a solid surface like a ceiling. When it reaches its apex, it explodes in a brilliant burst, creating a 100-foot radius area of bright light and dim light in the next 100 feet. In the night sky, this beacon can be seen clearly for miles. The beacon remains lit for up to 1 minute in a color of your choice. Alternately, you can fire a Signal Flare like a normal arrow to attempt to strike a Target—if it hits, the arrow inflicts normal damage and attempts to counteract one darkness effect of your choice that affects the area you hit with a counteract rank of 7th and a counteract modifier of +26.
Pathfinder #211: The Secret of Deathstalk TowerORC