Editing Spell Deck while Timer for PvP Match is Counting Down

Ok, So it is really easy all you have to do is have your spell deck open before you go in a pvp match then when the clock is counting down click your spellbook and it will show you your cards, You can now chnage them however you like!! (This only works while timer is counting down)..

Well lucas i have tried to but that doesnt work anymore. You have to have your deck prepared before you go into the match. I know this and i am sure because i am pvp-ing with my ice So yep