Board Thread:Questions and Answers/@comment-75.143.226.27-20140830212543/@comment-25262685-20140909053807

I'm not sure why that would happen before your battle, but most of the battle systems, like those for the standard battle, treaure battle, and Battle Royale (if you don't specify an attack %) will take all of your power after you battle. It will take all of your power regardless of your front line's power needs because it also pulls from your back line, ie. your entire deck will also fight and take power to do so. As far as I know the only way to stop this is to have nothing but your front line in your deck. Also if it shows something like 45->0 that just means it's going to take your pwr, but the pwr isn't gone until you tap battle.