(This is an au)
You had just ended a duel in a draw with Maximum Mathematician  but something happened at that moment. You had blacked out but awoke to find yourself in a forest as your normal self but something didn't seem right as you looked around you found that any flowers you tried to interact with would pass right through your hand as if they were virtual. Meanwhile as you were looking around the area, Maximum Mathematician or Rather Cynthia

Wakes up in a desert confused as she got up to investigate. Unbeknownst to either of you, you had ended up in the past somehow and inside of the virtual world Noah created to Trap Kaiba. What will you do?

(If you end up in a duel against one of the big five the deck master rule will be active but your deck master can only have up to two abilities with no overpowered effects like a instant win)