Re: Dog Collar
There aren't any noticeable effects for the holy sky and radiant eye collars, that's for sure. It wouldn't surprise me if these 2 collars were put in the game as somewhat of a joke. In their descriptions, it says "No effect on non-marksman dogs" and "No effect on non-magic using dogs". Obviously there are no will using or marksman dogs, and there is the possibility of Lionhead meaning something else by it, but throwing this in the game to mess with the players seems like something they might do. I mean, they did let you go around smashing people in the face with a frying pan in TLC.
And there is no collar to boost melee skills. These are the only 7 collars in the game:
Holding
Regality
Brooding
Fibrous Unity
Radiant Eye
Holy Sky
Bow Wow (Knothole Island DLC)
Also, not having a warrior collar in the game is yet more evidence that the radiant eye and holy sky collars don't do anything to help you. In the description of a warrior collar, there would most likely be something saying "No effects on non-warrior dogs", but dogs only use melee attacks. A dog would be a warrior before a marksman or a will user, so a warrior collar would have to do something for the dog. My guess is that Lionhead realized this flaw, and decided not to add a warrior collar.