The bandit Bakura has stolen the Millennium Puzzle and sent the Pharaoh plummeting into the abyss – now he’s another step closer to obtaining all seven Millennium Items and resurrecting the malevolent Zorc, the greatest evil of all time!  While the bandit king is close to executing his master scheme, Aknadin has set his own grand plan into motion – now that the Pharaoh is gone, he wants Seto to become the new Pharaoh!
I know what the eighth key is.