John Danker said:
If you refer to rulings listed in conjunction with
Book of Moon it should answer most of your questions.
Again, though, as I said, what if it's
not activated during the battle phase, or
Jinzo has not declared his attack yet? He has not attacked, nor manually
Shifted his battle phase yet, so he would be able to have the one allowed manual position change per turn. Effects can
Shift battle positions all they want, but unless the card otherwise states, you are allowed to manually
Shift the battle positions of the creatures once as long as that creature has not declared an attack for that turn. Examples using flip-summon "re-flip" creature as I call them, all in main phase 1:
Swarm of Scarabs,
Stealth Bird,
Guardian Sphinx, Sentry Golem, etc. is face-down, it can be flipped face up for its flip-summon effect, then attack, and be flipped back down in main phase 2 via its other effect that allows the position change.
The same creatures are face-up on the field, their position change effect can be activated to flip them back to face-down defense, then they can be flip-summoned via their one manual position change allowed per turn. Their flip-effects would still go off, and they would be allowed to attack, if they choose, during the battle phase, but they would
not be able to be re-flipped back to face-down defense again because the cards state that they may only be flipped into face-down defense once per turn, so they must remain in face-up attack position for that turn, unless put back into face-down defense by another card's effect (
Book of Moon,
Tsukuyomi).
Now, for examples using
Jinzo, or any other card:
It's the battle phase,
Jinzo attacks,
Book of Moon is played on him, the attack stops, and in main phase 2, he may not be flip-summoned since he has already attacked for the turn.
It's the battle phase, another creature attacks,
Book of Moon is played on
Jinzo, the other attack still goes through as normal, but now
Jinzo cannot declare attack since he is in defense position. In main phase 2 however he can be
Shifted back to attack position, as long as he wasn't just summoned that turn, or already changed his position manually during main phase 1, as he has
not declared an attack for the turn in this situation. In this case, the person activating
Book of Moon activated it at the wrong time. The
timing is key here.
It's main phase 1 (or 2),
Jinzo is in attack position and has been down for at least a turn, the turn player controlling
Jinzo summons a creature or activates an effect and the other player chains with
Book of Moon targetting
Jinzo.
Jinzo has not been summoned that turn, nor battled, nor changed his position, so he could still be flip-summoned in the same phase, or again, in main phase 2 as long as he didn't declare attack and the rest of the conditions listed are met (not summoned this turn nor already manually changed position.)
The same could be applied with
Enemy Controller. As long as the creature wasn't summoned, hasn't declared attack, nor manually changed battle positions, they can still change positions that turn. Just because you enter the battle phase does not mean you declare an attack. Timing is very key on many issues, just look at
Threatening Roar as well. If you activate it /after/ a creature has declared attack, that creature still attacks, you need to activate it at the end of main phase 1 before the player enters their battle phase and declares an attack. This is why I say I'm entering my battle phase, to give my opponent time to activate a card such as
Threatening Roar, because if they don't activate it then, and then try to activate it after I already declare an attack
after declaring I'm entering my battle phase, I'm going to call my opponent on it, and tell them the attack still goes through because I declared everything I was doing and they didn't respond until it was too late, just like you can respond too early with other cards.
Same way if I'm playing with
Threatening Roar, and my opponent doesn't say they are going into their battle phase but just declares an attack, I'm going to say I activated
Threatening Roar at the end of their main phase. They may be technicalities, they may cause some arguements, and people may not like you over it, but
Threatening Roar is neither
Negate Attack nor
Waboku, so it needs to be played properly. There are times where the opponent may have two creatures down, but you'd want them to attack with one, but not the other, so you'd have to risk using
Threatening Roar after one attack is declared, hopefully with the monster you wanted, after they declare attack, but before the other monster(s) can, so that they cannot declare attack. This is especially useful for "searcher" monsters you want to die, with effects that activate in the graveyard, but you want the creature they have searched for to live.
Sorry to go off on the
Threatening Roar tangent, but I hope my point about timing was displayed to where everyone is happy?
