Arena Supplement

From the introduction: Welcome, jumpers, to the main event! It's what you've all been waiting for, a chance to have a showdown with some of the biggest, the baddest, the strongest foes you could imagine. And not just that, you'll get to fight old enemies, past friends, maybe even some beings you never managed to meet at all! So come on in jumpers, and test your mettle in the Arena Supplement!