Potency Crystal Item 1

Pathfinder Core Rulebook (Second Edition), page 569

Category Consumables; Price 4 gp; Usage affixed to a weapon; Bulk —

Activate ◇ envision; Trigger You make an attack with the affixed weapon, but you haven’t rolled yet.

This fluorite crystal glows with a strange phosphorescence. When you activate the crystal, the weapon becomes a +1 striking weapon for the rest of the turn, gaining a +1 item bonus to the attack roll and increasing the damage on a hit to two weapon damage dice.