The point defense drone (PDD) is a defensive device deployed by the raven. It is constructed onboard through hundreds of thousands of AI-operated nanomachines. The drone uses lasers to accurately intercept many types of enemy weapon fire.
Its defensive abilities use up ten energy per shot. Units like vikings and phoenixes that attack twice or more per cycle will drain ten energy for each of its individual attacks (i.e. one viking attack consists of two missiles. Twenty energy would be consumed to intercept both attacks).
The ability was removed from the raven in Versus in the Patch 4.1.4 balance update.
Upgrades and Abilities
Point Defense Drone
Deploys a drone which intercepts missiles and projectile shots, such as those fired by missile turrets. It cannot stop special attacks.