Chimerian Hammer (Classic)

The Chimerian Hammer is Vilgax's space ship during the original series, the first one was destroyed when Vilgax was strapped to a warhead by Max. Vilgax stayed on the second ship while he was healing. It was destroyed when Max gave the self-destruct sequence to the ship. In the Alien Force episode The Secret of Chromastone, it appears in a flashback

Backstory
It is seen in the very first episode of the original series, going after the ship carrying the Omnitrix. Both ships are damaged in the battle, and the Omnitrix in sent to Earth in an escape pod. It looks like there is a class of battleships with same design, probably produced on Vilgaxia.

Powers and Abilities
The ship is very well armed, having many lasers and other weapons but his armour is not very effective. In the first episode, Xylene 's ship - much more smaller - could severely damage it in a few hits. The speed of the ship is very high - he had pursued a smaller size ship of Xylene's without any difficulty. The ship is weaponed with four cluster of four laser turret (secondary weapon), and large, forward gun, targeted by turning the entire spacecraft. It is operated entirely by Vilgax's robot crew. Oddly, it has similar sacs that Chimera Sui Generis have. These may be widows since there are some in the command station.

Ben 10: Protector of Earth

 * Here the ship is known as the Merciless and serves as the location of the final battle with Vilgax. It was destroyed when Ben destablized the Null Void projector and caused the ship to be sucked into the Null Void.

Ben 10 Alien Force: Vilgax Attacks

 * Here the ship is depicted as having a Null Void Projector strapped to the bottom of it, It was destroyed when Ben used Alien X to reverse the Null Void projector and caused to be torn in two as it was being sucked in.
 * According to all it's appearances it looks like there are at least four of those starships in the Vilgaxian navy