Get there using warp command:
/TNTThe 4 different arenas can be joined by clicking the relevant join arena sign.
How to play: Players start on layer of sand and every block that they step on dissapears. If player falls through the last sand level to the bottom pit he loses. The last player still in the arena wins the game. Basically like spleef only this time all you have to do is keep moving over blocks to remove them, while avoid falling yourself.
Extra commands should you want to use them, though signs are provided aswel.
/tntrun join <arena name>/tntrun leave/tntrun vote (use this to call a vote to start if not enough players have joined the arena)