Tesla Tower

Tesla tower is an automated defense that attacks hostile creatures with chain lightning.

It can be upgraded into tesla level 2 and 3.

Placing
A tesla tower can be improved up to the 3rd level by building additional sections above it. I.e., placing a tesla about another already placed, creates a tesla level 2. And placing another tesla above a tesla level 2, creates a tesla level 3.

A tesla level 1 occupies one block and can be placed on top of any supporting surface. A tesla level 2 occupies two blocks and a level 3, three blocks.

Removing
Only the base of a tesla accepts the "Remove" order. If the base of an upgraded tesla is removed, the other 1 or 2 pieces fall on the original suporting surface forming a downgraded tesla.

Like other towers, if a tesla or a section of tesla is removed by dwarfs, all components of this section can be recovered, allowing it to be rebuilt in time. When the tower is destroyed by enemies however, all the components will be lost.

Statistics
Tesla level 2 and 3 lightning attack can chain to one and two additional enemies respectively.