I was in Port Royal battling the Grim Reaper thing over the treasure chest, and Sora became a heartless thing with yellow eyes and a black body. I can't remember if I had chosen Master form, I think I did. I was wondering what was going on then I found out today about anti-form. Anyways, he was really strong. So is it just random, or is there any way you can keep it? Oh, and sorry if I'm doing something wrong, I haven't been on these boards in a long time. Thanks!