[Witch of salvation. Property is mercy. It sucks every organism in this planet and leads them to the new heaven (Enchantment) that she made. The only way to defeat this witch is to destroy every misery in this world. Then, witch will mislead that that world is already heaven.]
Bolded the importance. Practically, this guy is impossible to beat unless everyone in this world is happy from head to bottom.
I was reading this.... annnnnnnnnnnnnnnnnnnnnnnnd hold on.
PLEASE DON'T TELL ME THAT I'M THE ONLY ONE WHO THOUGHT OF THIS SCENE.
Edited: Oh wait, it can be 'DTB 2', also....
The first hand source: http://www.madoka-magica.com/special/dic/card27.html
The second hand source: http://alonestar.egloos.com/4553015