Shoots lightning on enemies which then spread to nearby enemies. It requires Uranium to operate.
- These are your strongest defense, spread them out where you need them the most.
- These are most effective against large groups. Put them where there are the most zombies coming.
- These are best kept the same level as your Arrow Towers.
- These have a high upgrade priority. Upgrade these before other defensive towers.
- These are best used when your base is against a wall or corner, and large masses of zombies reach your walls simultaneously.
- chains from one enemy to the next, dealing damage to each.
Characteristics at different levels
 original reference