Dragon's Dogma: Dark Arisen

After beating Daimon once, you can repeat Bitterblack Isle any number of times. From the second time on, Daimon will have a second, true form. You will still fight the same battle you did for "Conqueror" but then after you kill that form, he'll level up and grow a dragon face in his chest (seriously). This second form is much the same as the first, though magic becomes even more useless against him, and he uses it himself more often and with greater damage. His vortex move is also powered up and covers more of the arena, so you'll need to run even further away if possible. Otherwise, same strategy applies - climb on him and smack his face.