Yeah, this is what I get for trying to edit this from a DS. I don't see everything...
Let's say you have Pride Photon in slot 1. If there are Horned Frogs on slot 2 and 3 on your side, the Photon will attack the one on slot 2.
My original concept was how to get people to kill their own creatures. So, the prime target would be a creature on the opponent's side of the field while you had lower attackers that would stay out of harm's way.
AdrenaFrog wouldn't really work since it'd only get one attack in. A buffed Voodoo would work to, but that's at least a 3 card combo. Armagio would be another card you could use it with, considering it's bulk.
I guess I should also address negative attack...