Nitrogen

The Nitrogen is a Tier 4 tank that upgrades from the Chiller at level 45.

Design
The Nitrogen retains the design of the Chiller, but it has a longer blue rectangle.

Technical
The Nitrogen retains the abilities of the Chiller, being able to slow enemies down. However, it has a longer effect than the Chiller.

As the Nitrogen

 * Smasher tanks become even easier to deal with, as you can slow them for even longer.

Against the Chiller

 * The Nitrogen is weak to the following:
 * Bullet Spammers
 * Overdrive-branch tanks

Trivia

 * Nitrogen's elongated blue rectangle acts as a literal indicator of its longer effect duration.