Wormhive

Cost of the 1st level:

400 000250 00050 000CRP 2
Tireless worms dig a network of holes in the upper rock formations. Then, they fill the voids with their dense slime, which compresses the rock inside the frame after hardening. The density of the object increases according to the formula 0.1 * level * (1.18 ^ level).
You can only build it on the moon/Insectoid Entity/Dunkleosteus/Asteroid/Bank/Bestiary.
Comparison by level
Lvl Density bonus
1 12 %
2 28 %
3 49 %
4 78 %
5 114 %
6 162 %
7 223 %
8 301 %
9 399 %
10 523 %