Boomerang using masters of bouncing their weapons off of enemies, hitting multiple.
Boomerang Specialization
Boomerang Bills receive Weapon Proficiency with Boomerangs, as well as Weapon Focus (Boomerangs). At 5th level they receive Weapon Specialization (Boomerangs), at 10th level they receive Improved Weapon Focus (Boomerangs), and 15th level they receive Improved Weapon Specialization (Boomerangs).
This replaces Hunting Specialization.
Boomerang Ricochet
Boomerang Bills can make a full-round action attack and if they hit an enemy, they can bounce the boomerang off the initial target and make another attack against an enemy within the boomerang’s range using the initial target as the starting square. The boomerang can be ricocheted off targets a number of times equal to their Agility.
This replaces Eagle Eye.
Empowered Boomerang
For the Boomerang Bills, their boomerangs increase base damage by +2k2, Penetration by half the Boomerang Bill’s Agility, and finally they can add one of the following weapon special abilities to their boomerang: Finesse, Double Weapon, Brutish, Deadly, Accurate, Savage, or Æther.
This replaces Pierce Through.