Usopp, Captain of the Second Dision

Command: "Gather"

Shikai: "Collector's Staff""
Can gather different sorts of energy, such as force, sound, or light, and release it from the head of the staff.

Bankai: "Infinite Vessel"
A large, rotating dial overhead that can drain the energy of anything that approaches it, such as other types of attacks. Usopp can release it when her chooses either in a focused direction or wider, though weaker area.