If you had to make a case for a perfect DLC that improves on its base game in every way, The Old Hunters would fit that bill quite well. It follows the formula of "short but sweet run through a few areas with a few bosses" of the other Souls DLCs, but the bosses here really give the base game a serious showing-up. They're fast and relentless, but very well balanced on the difficulty scale. Each boss plays like a sort of dance, as you learn their tells and rhythm. It kind of goes to show how weak a lot of the bosses in the main game are in comparison. And that music... hot damn.