Spear Dancing Spiral (Combat)Source Weapon Master's Handbook pg. 17
You wield spears with poise and grace.
Prerequisites: Dex 15, Spear Dancing Style, Two-Weapon Fighting, Weapon Finesse, Weapon Focus with the chosen weapon.
Benefit: While using Spear Dancing Style, you gain the benefit of Weapon Finesse with the chosen weapon if it is appropriately sized for a creature of your size category. In addition, you can use any feat or ability that functions with a quarterstaff with your chosen weapon.