I have a bunch of souls that I cashed in with fragments during the last sacrifice event. Things like Epic Souls, Legendary souls. Except when I look at the fragments for those souls, I already have those specific characters. I was thinking that there is some sort of rotation of characters that you can get with souls. For example, now Edward the Great is the Eddie you can get from Heroic Souls. Will that change at some point in the future? If I wait to cash in my heroic souls, will I have the opportunity for different characters in the future?