The universe is ninety-nine percent sky and one percent island.
In the sky, the Wind rules.

The Wind Tower is a damage absorber. Place it between a valuable unit and enemy fire. The attacking unit will retarget to attack the Wind Tower.

On three sides it takes normal damage, but on its curved back it is utterly invulnerable. It is still vulnerable to air assault.

As you're preparing to build it, right-click to face the invulnerable side north, south, east or west.