Lasers

Lasers are the second tower unlock in campaign. They have an initial cost of 25 thorium. These towers only attack air targets.

Upgrades and Costs
Initial Cost: 50 Thorium

First Upgrade: Speed

Cost: 30 Thorium

Second Upgrade: Speed

Cost: 40 Thorium

Third Upgrade: Range

Cost: 50 Thorium

Fourth Upgrade: Damage

Cost: 140 Thorium