Bala

Bala is an Arrancar technique that hardens the user's reiatsu, and releases it from their fist like a powerful bullet. It's not as powerful as cero, but it's about 20 times faster. It's power also varies with the Arrancar and Espada. The more powerful the Espada, the more enhanced Bala becomes. Some prominent users are Yammy, Wonderweiss Margera and even Ulquiorra Schiffer.