Dark Cannon

Dark Cannon is Vanitas's Shotlock in Kingdom Hearts Birth by Sleep. As a extension of Vanitas, Vanitas Remnant can also use this Shotlock. In this Shotlock, Vanitas creates three crystals in a trigram formation, that project rays that fuse and become a giant beam of dark energy. Vanitas only uses this Shotlock in his final battle against Ventus.

Dark Link
While using Vanitas as a D-Link, Ventus's Shotlock is changed to a light based version of Vanitas's Dark Cannon, called Dark Link. Whenever Ventus uses Dark Link, Vanitas will always counter using Dark Cannon, making both opposite force clash with each other. The player then will need to either rotate the D-Pad or mash repeatedly until either Ventus or Vanitas wins the clash.