Ravager V2

The ravager v2 is a vastly more powerful varient of its weaker cousin, a absolute monster of a warship, takes many years and is very very difficult to create, when making its engine and certain parts a couple wrong bumps will completely wreck the entire piece, only the most skilled engineers/pilots get to touch these. They have multiple layers of thick Pulsar carbon 6 layers, each layer made up of many many many many cuboids, miles thick, the first layer is infact  untouchable, acts like a atmosphere, burns up weak rounds, and weakening stronger rounds, the 2nd is also untouchable still acting like another atmosphere, when a cube from the layer behind is damaged enough, a cube of the 5th layer becomes solid to protect it. If worst comes to the worst and it becomes critically damaged and is at high risk of taking internal damage, the entire 6th layer becomes solid buying time.

These things cost a LOT, with only about 15 that have been successfully created to date.

Reason behind why it is well known
This ship single handedly ended a long war when the SDS was newly formed.

Note
You may think the 5th layer only appearing AFTER the 4th is very damaged is quite stupid, it should just be there anyway, however its made of Pulsar carbon and this is self healing, so by the 5th layer becoming solid (and if worst comes to the worst the 6th) it actually buys time for the previous layer (if the 6th layer, layers) to repair themselves as much as possible.