Uno: Tylerdapwnzer45's very first Arena. This is an enormous arena, with secrets almost everywhere you turn. It has a very good use of Redstone, lava, Nether Brick, and more. *Warning* Depending on your computer's performance, the elevator might not function properly. If it doesn't, use the staircase instead.

Mods used: Toomanyitems 1.4.6. That's all. Everything else I built by hand.