Dragoon Lance

Dragoon Lance is a polearm.

Source
Dragoon Lance can be obtained as a reward for completing the Dreadful Legend quest. It can also be found as a collectable at the treasure spot south of Aracheole Stronghold and northwest of the Cauthess Coernix Station during Chapter 15. It can be sold to shops for 6,000 gil.

Trivia

 * In real-world European warfare, dragoons were 17th and 18th century soldiers who rode on horseback but fought on foot. In the Final Fantasy series, dragoons are airborne lancers and spear-wielders. Many famous dragoons in the series bear the "Highwind" name (including FFXV's Aranea Highwind).