After killing the Antimatter Dragon of the End, you just get a ton of levels, and a trip back to spawn. Not all that great a reward, considering all the time and effort you took to gather up all that stuff you needed to kill it, (unless you TMI'd it all,) So why not get a blade? The Dragon's fang would be death incarnate. hold down left mouse, and release a beam of dark flame. Hold down right click, and release, and send all mobs around you to their deaths. Got a crit? That zombie explodes. A sword worthy of one who bested the monster. Or a power-drunk admin.