Double Pain

Double Pain is the fifth Defense in ScrapTD and costs 200 bricks to unlock.

Strategical use
Before the Tesla Tower was added, it was very useful and should have been placed more than Blue Laser, because it was the only good air defense.

Now it's suggested to just place a few because of needed space for the last defenses, five should do; enough to defend It's Alive until Tesla Tower can be bought.

Against Danger Zone, 8-12 of them can defend them if paired with Blue Laser, but it's also risky because you'll waste a lot of tiles, meaning you'll easily get disadvantaged late-game. It can be a good strategy against bots.

Trivia

 * It was named in 0.1.2.