Sky City (International Version)

Sky City is the first world of PvZ2: Unknown Eras DLC. It is correspondent to the an unknown period of the History, being probably from World War II or a nearby Future.

Horse Bean (from the Chinese Version) is the gem premium plant that represents the White Clouds and Hollista is the money premium plant that represent the Dark Clouds (for info about the meaning of these "clouds", check the Division section).

Game Description
The world' s description tells about the world' s gimmicks and zombies. It is exactly the same as in the Chinese Version:

''This is a vast endless sky. Clouds there are filled with dangerous lightning. Zombies are driving all kinds of dangerous weapons. You will meet an unprecedented challenge. Watch out or you will be gunned down!''

Sky Tiles
Sky Tiles are special tiles that only alllows aerial plants, such as Rotobaga, to be planted. Normal plants can only be planted there with the help of Mulcopter.

Airship
The Airship is a new feature that also acts as an extra challenge. The Airship has its own health and can be attacked by the zombies. If the Airship runs out of health, it will be game over, but, unlike on the Chinese Version, it won' t replace the normal losing condiion, meaning that zombies can still walk while attacking it. It can also be jammed (a jammed ship will take damage constantly for a certain time), being able to be instantly unjammed if a Saucer is planted near one of its turbines.

Thunderbolt Charges
Thunderbolt Charges are an event that affects plants when combined and may happen during the level or be simulated by Lightning Gun Zombie. The possible charges combinations are: Charges can be absorbed by Ionic Anthurium.
 * Negative+Negative: Stuns the affected plant.
 * Negative+Positive: Slows down the affected plant.
 * Positive+Positive: Constantly damages the affected plant
 * Neutral+Positive: Will constantly damage plants that are adjacent to the affected plant.
 * Neutral+Negative: Will damage the Airship and replace a pre-existant normal tile with a Sky Tile.
 * Neutral+Neutral: No Effect.

Trivia

 * Some plants were buffed or nerfed to fight certain zombies.
 * Coincidentially, the Chinese Version also allows Loquat at Day 06 and immediatly before Anthurium.
 * It is the second longest world in Plants vs. Zombies 2: Unknown Eras DLC with 42 levels (not counting Modern Day), the first being Invasion of the Asians,