The Phoenix is a Protoss air unit that attacks other air units. It can fire while moving.
The phoenix is a swift and deadly spacecraft that is rapidly replacing the older scouts and corsairs in the role of fighter for the protoss. Phoenix patrols are a common sight on the outer rim of protoss territory, where they sweep deep space for alien threats. The twin ion blaster armament of a phoenix is highly suited to air-to-air combat and can also be used for strafing light ground targets.
Sophisticated and lethal as the phoenix may be, all too often a patrol squadron will find itself heavily outnumbered by zerg or terran enemies. To overcome this weakness, phoenix pilots have developed a dangerous counter-ploy. A phoenix pilot can unleash a short-lived storm of destruction by overloading its warp field through the ship's ion blasters.
The area-effect discharge is devastating and can destroy a large number of enemies at once, but it comes at a price: in the aftermath the phoenix is left temporarily powerless and crippled. Wary foes have learned to flee a phoenix overload and return moments later to destroy the helpless craft. In turn phoenix pilots have begun to use staggered discharges to catch their enemies in a web of destruction.
These desperate tactics are frowned upon by protoss commanders, but have become tacitly accepted as a necessity in the desperate times facing the protoss. Through extraordinary dedication and bravery, these daring pilots have done much to even the odds.