This is what will Happen when Star Gaurdian Lux succumbs to despair

First he soul will break http://images2.wikia.nocookie.net/__cb20111110224056/madokamagica/es/images/f/f3/Sayaka_grief_seed.gif

Then she will Become a Witch http://38.media.tumblr.com/4c08b2f9316511f78d013a202cadf783/tumblr_mm3bn36S3h1r1lm3jo6_500.gif

All Thanks to This little shit http://images5.fanpop.com/image/photos/25900000/GIFs-puella-magi-madoka-magica-25911425-500-234.gif