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From Pathfinder Secrets of Magic, which isn't enabled.

Guiding Star

ITEM 7
Price 325 gp
Usage held in 1 hand
Bulk L
Category martial
Group knife
Damage 1d4 piercing

This +1 striking returning starknife is made of dark blue metal overlaid with smoky flecks of fused quartz. When you Cast an evocation Spell, your next attack this turn with this starknife reduces the target's cover, changing greater cover to standard cover or ignoring standard and lesser cover.


Activate envision
Frequency once per 10 minutes
Trigger You successfully Strike a creature with a thrown Strike with guiding star

Effect Soft light outlines the target. At the beginning of your next turn, the guiding star's blades detach and form into darts of starlight, flying up to 40 feet and striking the target unerringly, collectively dealing 4 piercing damage and 1 spirit damage before re-forming. The piercing damage increases to 6 piercing damage with a greater striking rune and 8 piercing damage with a major striking rune.
Pathfinder Secrets of MagicOGL