uncommon cantrip divination psychic 

Cast [>] verbal

Range 60 feet; Targets 1 creature

Duration 1 minute

You glimpse a loose scale, a seam in a foe's armor, or a similar weakness, aiding your allies in landing a precise hit. The first ally that hits the target with a successful Strike deals additional precision damage equal to 1 + this spell's level, and then the spell ends.

Amp The additional precision damage is 1d4+1.

Amp Heightened (+2) The additional precision damage increases by 1d4+1.

Dark Archive, page 18.