whatever you wish-eater of gods, eater of dreams, hunter of heroes, doom horror or something of unreason-you get a horror randomly pick out from above, mostly eater of dreams. there's one of them have a 0 map movement, and one of them(sth of unreason iirc, the one looks like an octopus)have a 10 map movement but in fact cannot move at all. for each two wishes or what you call horrors you get one of them, another time being "assainate" by a horror. Thus to avoid your pretender's death, give him 2 astral pearls and script him "Returning". At next month, wish again and you'll likely get a horror at your own.
Note: Doom horrors you get from wish randomly disappears. It may vanish at the 3rd month you get it, or it may not disappears till the game's end. Once it's gone, you'll get a message like "Agon was suddenly nowhere to be found".
HTH
