Obelisk would defeat Slifer in a battle

1. Power Yes, Obelisk would need to sacrifice five monsters. However, for Slifer to defeat Obelisk, three monsters would have to be sacrificed, and five cards would have to be in the duelist's hand. As cards that allow a duelist to draw cards are extremely limited, the Slifer duelist would have to use his hand sparingly, and wouldn't be able to summon monsters easily. The Obelisk duelist, meanwhile, can use Spell and Trap cards like Double Summon and a combination of Card Destruction and Premature Burial or Monster Reborn to summon monsters more quickly, allowing for easy access to more cards. The Obelisk duelist could even use Polymerization to instantly summon a powerful Fusion monster like the Dark Paladin without using a Normal Summon [2], which coulds as two sacrifices for Obelisk instead of one [3], without having to make a Normal Summon; the Slifer duelist cannot, because this would mean using three cards to summon a single monster, and he can't afford to shrink his hand so much. The use of a Fusion monster would also allow the Obelisk duelist an easy way to activate Soul Energy Max as the only monster on its side of the field, even on the Slifer duelist's turn, to destroy Slifer the instant it attacks. The Trap card Call of the Haunted would revive Dark Paladin, able to survive Slifer's second mouth and previously used as a sacrifice to summon Obelisk. Obelisk would then sacrifice the Dark Paladin with Soul Energy Max (which counts as two sacrifices, a Fusion of two separate monsters [3]), another action that can be performed on the opponent's turn [1]. Obelisk then rips Slifer to shreds with his Fist of Fate. My opponent's claim that Slifer destroys Obelisk is quite false, as Obelisk can destroy Slifer in the same turn that he appears. My opponent might claim that Obelisk may not use the power of other cards, that this is a one-on-one fight. If that is the case, then Slifer may not draw power from a duelist's hand, in which case, Slifer has 0 ATK compared to Obelisk's 4000, and would still be defeated. 2. Battles My opponent concedes this point. 3. Summoning My opponent evidences the "pyramid example" as why Obelisk cannot destroy Slifer. However, I have already evidenced Obelisk destroying Slifer in the duel between Yugi and Kaiba. Additionally, throughout the duel, Obelisk had many chances to destroy Slifer, but these attempts were prevented by the effects of other cards, like Electromagnetic Turtle, not Slifer [2:5]. Obelisk has even attempted to destroy Ra before [3], and was only prevented from doing so by a Spell card, Class System, not Ra's inherent superiority. My opponent claims that Slifer can sacrifice two cards to tie with Obelisk, or three cards to defeat Obelisk, but he provides no source but the general description of the God cards. The ability to gain infinite power, however, is exclusive to Obelisk. He continues to claim that Slifer can have infinite ATK, but this is impossible, and he provides to reasoning. In conclusion, with his almighty infinite attack power, Obelisk the Tormentor banishes Slifer to the Shadow Realm with a single Fist of Fate. Good luck, ethopia. 1. . http://yugioh.wikia.com... 2. . http://yugioh.wikia.com... 3. Jaden demonstrates this by Normal Summoning a monster after Fusion Summoning another. . http://yugioh.wikia.com... The effects of all Yu-Gi-Oh! Duel Monsters cards sourced can be found in the provided Yu-Gi-Oh! wiki.