What is the Arena?
The Arena, commonly referred to as the terrarium or centrum is the first server pvp arena. Players battle it out with whatever they have equipped themselves with and aim for looting the other players items or head.
How do I get to the Arena?
You can get to the arena by simply going to spawn (/warp spawn) and walking there, or you may choose the shorter route and issue the command of /warp centrum and it is directly in front of where you spawn in.
What do I need to know about the Arena?
You need to know that the Arena is a pvp-enabled area, specific for battling other players. This means they may kill you and take your things. Hacks are not allowed. It might be beneficial to check out the server pvp rules at (link followed): http://meepcraft.com/threads/pvp-rules.14284/