Radiant Lance

Radient Lance is a polearm. It is especially effective when fighting daemons.

Source
Radiant Lance can be purchased from the Culless Munitions at Meldacio Hunter HQ (anytime) and Hammerhead (Chapter 14) for 10,000 gil. It can also be found as a collectable in the Costlemark Tower and Pitioss Ruins dungeons. It can be sold back to shops for 5,000 gil.