Spire

Cost of the 1st level:

800100250 CRP 1.7
A Spire helps to signal the swarms outside of your planets and explore more complex forms of mutations. The spire can send the fleet with any order. During the defense of your planet Spire is the center of communication of the allies in medium orbit. Each level allows you to attract 2 players to defense. Allows the larvae to mutate into Dreadlisk, Guardians, Devourers and Pancors.
Comparison by level
Lvl The number of allies in defense
1 2
2 4
3 6
4 8
5 10
6 12
7 14
8 16
9 18
10 20