Sky City - Day 21 (Pre-1.8)

Castle in the Sky - Day 21 is a twenty first level in Castle in the Sky.

Strategies

 * Most dangerous zombies such as Zombie Fighter, Arbiter-X and Double-Cabin Aircraft that can damage the ship.
 * Also has a lightning strike that can attack you plants, must be use Anthurium and Transport Boat can summon Imp that destroy your defense.