Phaser

The Phaser is a cyan Crasher that commonly spawns in the Pentagon Nest.

Design
The Phaser is a cyan dart-shaped quadrilateral.

Technical
The Phaser has the ability to turn invisible, but it is rather useless due to its FOV. It also has mediocre health.

Countering
The Phaser has low health, so its not dangerous, meaning you can let it hurt you a bit. But of course, this is not recommended if you have low health however, in this case you'll have to shot at it.

Trivia

 * The Phaser has a boss version: Vanguard.