Great card, I feel it's balanced and I like the anti-deckout element, though because it's a permanent it is not infinite, and it requires a targetable creature. The one reservation I have is that it's the same hate-group as Elite Oty, and gravity still has nothing that it can do about exactly 5hp creatures (other than GP), but that's very minor, and probably intended. Now, questions.
1. If the creature that 'Law' relates to is killed / RTed etc, does Law stay on the field but not affecting any creatures?
2. You mention momentum as the benchmark for when Law is / is not removed - does this mean Lobotomizer would remove it's effect, as it does with momentum?