This ship belongs to an alien named Xylene.
It is mainly blue and green. Compared to The Chimerian Hammer it is pretty small. It has a resemblance to Galvan tech and ihas alot of detail.
This ship does have some weapons however not enough to protect itself from Vilgax.
It first appears in And Then There Were 10, when she is fighting The Chimerian Hammer however she send the Omnitrix to earth while the ship is taken down.