Forum:Trying to understand how Banner of Courage works?

There is a question that has yet to be asked & pretty much will remain unresoved unless it is answered. I'm talking about "Banner of Courage". To everybody else it seems to be complete, but to me however, it is incomplete. Now this is what needs to be done & pronto, there needs to be a total extended reprint of the card & it needs to start as usual & end like this.

During the battle phase, all monsters you controls gains 200 atk, until either 1 of 3: 1. the end of the battle phase. 2. the end of your turn. or 3. the end of your opponent's turn.

Now I need somebody to choose right away.