So this is basically a 44 x 44 TNT Flat but with a twist.....
And as you probably guessed it. It says it in the title. It's a battleground...
filled with creepers. But in the room you spawn in has a chest with resources to escape the obsidian box.
Please DO NOT COPY my creations.
Here is the obsidian box and chest
Birds eye view
Press the green text that says "44 x 44 TNT Flat Battlegrounds Survival World - (MediaFire)."
Then it will redirect you to the MediaFire download link. And then you'll see a big blue button.
Click that button and then the world will start downloading.