I would say that the rule is to just kill your opponent already. To get (and keep out) 4 tokens, assuming that the card that made them is a one-of, you would need to play it 5 times without your opponent being able to destroy your champions. That means that you probably have a fairly slim deck (you are probably playing the card 5 turns in a row) and your opponent is not able to deal with your champions. Stop playing with your food and go for the kill.
I agree with you and I do not expect it will happen.
It was just a theoretical construct and I am such a person... I just want to know the rules in the best way that is possible^^