I'm trying to find a book I read in the late eighties but I can't remember the name of it at all.
The plot centered around a man coming to a fighting tournament. He wears a sort of gray/silver jumpsuit. The main antagonist is wearing gold armor but is very fragile and weedy inside the huge armor (blue/gray skin tone). The front cover depicted both of these men along with a group of people watching who were the rulers of the planet. It turns out that these are in the grip of a tentacled being who is controlling them with a tentacle in each member's mind. I think he had a companion who had wings (could have been an angel or the name of the lady was angel).
Can anyone suggest what this book could be?