Now that Mokuba had gotten the battle between him and Marik out of the way, it was time to get his last opposition out of his way, his own brother Seto. He needed to re-build his deck for this battle, adding his two new Egyptian God cards Slifar and Ra. Sitting down on his bed; he finally took out the key to his trunk. He opened it up and took out the best cards and re built his deck.
He located his brother using his Ritualistic flute and challenged him to a duel. Seto, thinking his brother was a weakling, accepted and put his Obelisk the Tormentor on the line.
Both duelists drew their first five cards, and Mokuba went first. "First, I'll play Pot of Greed to draw two cards. I'll play Chainsaw insect (2400/0) in attack mode and lay down two magic or trap cards." Seto drew his card. " I'll play Kaibaman in attack (200/700). I'll offer him by his ability and summon a Blue Eyes White Dragon (3000/2500) from my hand. I'll attack your Chainsaw Insect!" Seto screamed. " Not really, because I'll activate Draining Shield to negate the attack and gain 3000 lifepoints." Mokuba 11000 Seto 8000 " And now, back to me. I'll play out D.D. Assailant in attack mode (1700/1600). Then, I'll activate Pyramid Of Light and pay 1000 like points to summon both Sphinx Teleia and Andro Sphinx! Finally, I'll play Heavy Storm to destroy my Pyramid of Light and summon Theinen the Great Sphinx to the field (3500/3000) and I'll increase his attack by 3000 (6500/300) by paying 500 more!" Mokuba 9000 Seto 8000 "I'll attack your Blue eyes and lay one card face down." Mokuba 9000 Seto 5000 "I'll play Monster Reincarnation and take back my Blue Eyes," said Seto. " I'll then play polymerization to summon My Blue Eyes Ultimate Dragon (4500/3800)!" Mokuba just laughed and flipped his facedown card. "I'll activate Ring Of Destruction and get rid of that pesky Ultimate Dragon." Mokuba 4500 Seto 0500 " Well, I guess I'll just play Gear Golem the Moving Fortress and pay 800 life points to attack you directly for 800 life points!" Mokuba 3700 Seto 0
After taking the Obelisk from Seto's deck, Mokuba got ready to kill Seto. Seto, now able to see that his brother isn't normal, started to say how he was Mokuba's flesh and blood. "Well, if you haven't noticed, I'm not Mokuba! I am Osiris, the Egyptian god of death. I think it is time for you to DIE!" When he said that, he pulled out his flute and beheaded Seto. After that, he took out this cup made out of a human skull and drank his blood. This is how Osiris gains his power, by drinking the blood of his victims and gaining soul essence.