Back in 2001 Marvel hired comic book heavy weight Grant Morrison to reinvent the X-Men. Among the many new ideas Morrison brought to the table which included new costumes, secondary mutations, and a distinct Mutant subculture he also introduced a handful of new mutant characters, Xorn being the most controversial of the lot. Originally, Xorn was a Chinese Mutant who was forced to wear a skull mask and had been imprisoned for many years. He eventually became a teacher at the Xavier school who spent time mentoring the institutions more troubled students. During the conclusion of Morrison monumental run, it was revealed that Xorn was actually Magneto (who had presumed dead after the destruction of Genosha), and after a giant battle between him and the X-Men, he died symbolizing the end of a Mutant era. After Morrison left the book, the Marvel big-wigs decided that they wanted to bring back Magneto, so they hired Chuck Austen to retcon both Xorn and Magneto into existence. Apparently, Xorn was a distinct person who was under the influence of someone else. And just to make things more complicated, Marvel introduced a second version of Xorn who was a twin to the original. Needless to say, these retcons cripples the end of Morrisons run, and frankly, only confuses the matter of Xorns true identity. However, what makes this retcon even more controversial is Morrisons vocal disapproval of Marvels decision. In fact, Morrison took the change as a personal offence and refuses to write for Marvel to this day.