EDIT: I just realized the wonders of adf.ly, so you'll have to go through there now to get to the download, sorry for the inconvienience if any. 


NOT TO BE CONFUSED FOR THE MORE POPULAR VERSION



Using tutorials and the 1.7's new commands, I made a map pitting Villagers with Iron Golems and Zombies. They all spawn automatcally using redstone, and at night you can release the Zombies unto the Village. Whatever you do, DO NOT TOUCH THE REDSTONE or else it may screw everything up. Everything is automatic, except the buttons toggling day and night and the scoreboard. Well, that's all you should know. Post in the comments any issues or bugs you may find. Good luck! :)

Instructions

1. Download the map, and put it in the saves folder in your .minecraft folder.

2. Enter the world. You should find yourself in front of a scoreboard.

3. To start, push the button to the left to get creative mode. You'll need it.

4. Now, you should grab the Instakill Sword. It's on a command block to the right of the scoreboard, at the Zombie Stronghold.

5. Now that you can kill any remaining mobs, let the Zombies build up an army in their stronghold.

6. After a satisfactory amount of Zombies have spawned, press the "Set Night" button on the top left of the scoreboard.

7. The Zombies are released automatically. They travel towards the Village and attempt to kill all the villagers. Iron Golems, however, will get in their way.

8. The Zombies and Villagers stop spawning at night, but Iron and Snow Golems spawn any time.

9. At night, Zombies and Zombie Elites will stop spawning. Wither Bosses and Stealth Squads will spawn.

10. After the attack is over, set it back to daytime using the "Set Day" button at the top right part of the scoreboard.

11. The Zombies would have died off from either the sun or the Iron Golems. The Wither Bosses and the Stealth Squads may find a way through that. Wither Bosses don't die in the sun, and Stealth Squads can hide in houses. Kill the remaining hostile mobs with the Instakill Sword.

12. There is a recharge time between attacks, added in Update 1.2. "A Zombie Commander" will let you know when the horde is ready. If you start the attack before the recharge time is up, the redstone may get screwed up.

13. After the recharge time is over, you can start the attack once again.

14. That's all you need to know, for real this time. Enjoy! :)

Update Info: 1.4 is here! In it is achievements, and other bug fixes. Keep the Christmas map for the Christmas stuff, because this update has nothing like that.

Database

Zombie: The original braineater. He hates Villagers, but likes their brains. Very Weak

Zombie Elite: A Zombie that found old diamond armor. Very Strong

Zombie Commander: The leader of the horde. Can be spawned infinitely. Strength depends on Number

Wither Boss: A Wither that the Zombies summoned to the Overworld. Extremely Strong

Stealth Squad: A team of agile, smart Zombies formed deep in the Village. Strong

Zombie MEGA BOSS: A strong zombie that has fallen, but now is revived... Extremely Strong



Villager: A man who loves trading emeralds. Very Weak

Village Protector: An Iron Golem who has devoted their life to the Village. Very Strong

Village Defender: A Snow Golem that likes high places. Likes helping the Village. Extremely Weak