Gallery of the Day8 Of the Hardest Bosses in the Dark Souls SeriesGallery of the Day - RSS 2.0
Dark Souls 2: Crown of the Old Iron King DLC
The final boss of the Crown of the Old Iron King DLC is definitely challenging enough. He's got statues that let him heal (you should smash those), and he hits like a train in the first phase. Of course, it gets worse in the second phase of the fight. He coats his sword in dark magic, which he use to drop orbs that damage you around the area, and he continues to require perfect timing to dodge his powerful swings.