Event: Withering Builds! [EVENT OVER]

I want to try a building competition with a twist. It may not work out perfectly it never does, but that'll be determined in the future!

Description:
Build a structure(s) to protect yourself from the Wither. In other words, don't die! Feel free to grief and steal blocks from your opponent's structures when the game begins.

Date, Location and Time of Events:


3 rounds will be held on our regular server. In other words, the vanilla server on 1.7.4, using the IP 192.210.143.29.

January 18th, 2014 3pm Eastern/12pm (noon) Pacific
January 18th, 2014 8pm Eastern/5pm Pacific
January 19th, 2014 3am Eastern/12am (midnight) Pacific


Rules:

1. Do not leave the arena or take any blocks/items away from it.
2. Do not attack other players.
3. When, and only when the round begins, you may break blocks from other people's structures and use it to your advantage.
4. Additional Withers will be spawned if the round takes too long.
5. If you die, you are out!
6. Feel free to craft whatever items you feel may be helpful.
7. In the unlikely event that a Wither is killed, another one will be spawned immediately.


Prizes:
One winner per round. If you have already won, you may participate in another round, but you will be ineligible for a prize.

2 heads of their choice (wither skeleton, skeleton, zombie, creeper or player head), 1 diamond block and 1 Mycelium block.



Disclaimer:
In case of any discrepancies or grey areas that have not been covered or may occur, I will get the final say. In the event I do not show up within the first 10 minutes of the round, it will be cancelled. By participating, you acknowledge that you agree to the guidelines above (I know not everyone checks the forum).

If you have any questions or suggestions, let me know. Good luck!

Video is up!

https://www.youtube.com/watch?v=iB5y0v-wqqA

Thank you for helping, Kris!