Okay, so I understand the point of all of this and I know how to get each horse but my game is confusing me badly! I have wrangled the War, Pestilence, and Famine horses already. I didn't physically wrangle the Death horse myself but I was than awarded the Death horse at the end of the Undead Nightmare story line and received the blood pack and everything. BUT, I go into my journal and it says, "Four Horses of the Apocalypse - Rank 4," as if i haven't gotten the Death Horse yet but i'm clearly riding it. So i got rid of the Death Horse and went to the locations where it can be wrangle that i found in my morning of research, and there was no sightings of the Death Horse. I don't know if i'm just screwed out of getting the challenge or what. I haven't tried going back to find any of the other horses in there locations and maybe wrangling all of them again just to be sure that i got them all but i'll do that while waiting for comments from anyone. and i Can't get the Mythical Unicorn yet either. it's not at any of the locations so if anyone knows anything about how to activate it's existence in my game than i would greatly appreciate that as well. All-in-all i'm a little confused as to why this is going on and would appreciate any help i can get!! Thanks.