Wyrm

In-game description:

The Wyrm is a premium ship of the frigate class. Since it costs real life money, it is the most powerful frigate, having more health than its counterparts and being tied for the fasted ship in the game, with a speed of 9 m/s.

Despite being a premium ship, it will still be outmatched by destroyers and higher class ships, unless it is heavily upgraded. As one of the smallest ships in the game, and being premium to boot, it is one of the best ships for sneaking around or surprising unaware enemies.

Trivia:

A wyrm is a type of dragon that commonly appears in British and Norse mythology. These dragons have no legs or arms and only the long, scaled body of a serpent.