|Adjacency||+1 , Ship Construction+1 All Construction|
|Construction||0 Social Construction|
Matryoshka Forge is an Artifactcolonial improvement in .
The Matryoshka Forge produces a layered defensive barrier with a density beyond what was previously thought possible. The envelope provides protection against every type of attack. Despite its ruined state, with the proper research and structural support, a civilization can apply the forge to a small number of projects before it finally collapses.