Oh.... okay
So... who's up for another fight? 
Currently Sieben is riding the ox and steeling the cursed blood. Which... If you all are up to it. .. Could engulf Sieben in darkness and made him go evil. While the coursed blood would give him large magic power? And to free himself from the darkness he would need to use up all his power. 
I can even make a twist and once he gets close to tiring, the darkness uses his power to transfer itself to someone else. 

Who's up for that.?