Heavens Arena

This idea i taken from an anime "hunter x hunter", it's a very intresting way of PvP.

It works like this (for more information read about it in the wiki):

Heavens arena is a tower with 251 floors.
In order to go to the next level you have to win a certain number of points given by winning a battle. Also, you get a reward when you win.
That way as you ascend you have to fight against tougher players, but the rewards get better and better.

I'm taking the PvP idea behind it, also it'd be kind of fun that only the tougher players can enter into the next level.

I like this... sounds familiar, actually.