This is a 40 card deck based on the deck Yami Marik used against Yugi, while controlling strings. Use cards like Nightmare's Steelcage and Gravity Bind to stop your opponents from attacking with there most powerful monsters. The get a revival jam on the field. You can activate Jam Defender and place some more monsters on the field, like Humanoid slime or Man-Eater Bug as a defense, and then you can summon and attack with Jinzo #7, who won't be effected by Gravity Bind, and can attack directly. By this time you might have Wave-Motion Cannon, and this can pretty much make you auto win if you've waited enough turns. After some more turns go by, you can use a combined effort of Wave-Motion Cannon and Gem flash (and also Jinzo#7) energy to deplete your opponents LP, and keep using Revival Jam as the ultimate defense, continuing to revive it! Of course, things might not always go this way, and we have XYZ's and Links, who don't have levels. You can easily destroy these monsters with Raigeki, plus you have other good spell and trap cards to foil your opponents plans as well, like Mystical Space Typhoon and Divine Wrath. If you don't have Raigeki, or it gets destroyed some how, you can use a better alternative to get rid of your opponents monsters: Lava Golem. Lava golem gets rid of two of your opponents monsters AND does 1000 damage to them turn after turn. And if you still have a Gravity Bind on the field, It won't be able to attack. If none of that works though, and you don't get lucky enough for the perfect strategy above, believe in the heart of the cards more! And try this next strategy. Using some new strategy, you can get Metal Reflect Slime on the field fairly easily, and with it protecting your LP get some more monsters on the field, protecting them with spells and traps. The easiest way to get quick monsters with this deck it to activate Jam Breeding Machine, summoning you some little jam tokens every turn. Now, once you have some Jams on your side, activate Mystical Space Typhoon, and get rid of your ow Spell: Jam Breeding Machine. With that card of the field, you can summon Slifer the Sky Dragon! If you don't have or have already used all your Mystical Space Typhoons, wait until your opponent destroys Jam Breeding Machine with one of there effects. People do that a lot when I duel them with this deck for some reason. Next use fusion sage if you've got it from the side deck, or use polymerization if you have it to fuse Slifer and Metal Reflect Slime to summon Egyptian God Slime! This card is practically unbeatable, not being able to be destroyed by battle, or targeted by card effects. This card can then destroy your opponent (with some help from the rest of your amazing deck) insuring victory. I know that you probs won't always be in the best position for one of these strategies, but there are many more inside the deck to explore. Have fun with this deck. It's surprisingly good. Btw in the extra deck a Fiber Jars, they are a banned card but if your playing for fun with no banned cards it's cool to have in the deck. (This is an updated version because my last didn't include polymerization.)