Ion Cannon

Spinal (non-turning) weapon that fires a powerful, long-ranged beam.
The Ion Cannon is a powerful laser that requires 5000 minerals and 50 energy to place. When enemies pass in front of the ion cannon, it will fire a laser beam that deals large amounts of damage every second. The Ion Cannon is one of the two weapons in the game that cannot rotate, the other being the Missile Launcher. It is also the only weapon in the game that cannot attack targets that aren't directly in front of it. Due to this if you are using this as a main weapon you might want to watch out if you're fighting more than one enemy.