This base tower can evolve into aura towers that can affects surrounding towers or units.

In this basic form you can further upgrade this tower into:

Aura-Tower

Aura Tower

Gives different Auras for your buildings or the units.

Stats
Cooldown0
Range0
Build cost150 G
Total cost25 G

Upgrades into:

Icon Not Found
Short Aura-Tower
Icon Not Found
Long Aura-Tower