Crystarium Weapon

Crystarium weapons can originate from any predetermined part of your body, such as the mouth, a limb or some other extremity or organ. Most Crystarium weapons are offensive extraordinary abilities, although a certain few are psionic in nature. A Crystarium weapon save DC is Constitution-based if non-psionic, or Intelligence-based if psionic. 

The types of Crystarium weapons you can choose from are the following: the Non-Psionic Weapons - Acid Spray (acid damage), Cryonic Bolt (cold damage), Flamethrower (fire damage), and the Psionic Weapons - Electric Jinx (lightning damage), Sonic Burst (force damage), and Mind Tremor (psychic damage). Crystarium weapons project their power in a 20-foot line. The DC for the required DEX saving throw is either based off your Constitution or Intelligence, depending on whether you've chosen a psionic weapon or not. A creature takes 2d6 damage on a failed save, and half as much damage on a successful one. The damage increases to 3d6 at 6th Level, 4d6 at 11th level, and 5d6 at 16th level. You can use your Crystarium weapons once per short or long rest.