1. Jackpot Combo
This combo is very complex and requires you to possess 5 cards and spell/traps to protect your monsters.Required Cards:
3 Jackpot 7 (spell cards)
Morphing Jar
Mystic Box
Cards to protect Morphing jar
(Prevent morphing jar's destruction ex. impenetrable attack, waboku)
1 Strong monster
When this card is activated: Shuffle this card from the field into theDeck. When this card in your possession is sent to the Graveyard by an opponent's card effect: Banish this card. If 3 of your "Jackpot 7" are currently banished, and were all banished by this effect, you win the Duel.
FLIP: Both players discard their entire hands, then draw 5 cards.
Target 1 monster your opponent controls and 1 monster you control;destroy the first target, then give control of the second target to your opponent.
TURN 1
STEP 1: Summon morphing jar to the field in face down defense position.
STEP 2: Place the spells/traps to protect morphing jar face down on the field.
TURN 2 Assuming that your morphing jar was untouched by your opponent follow these steps to end the duel.
STEP 1: Activate mystic box to give up possession of morphing jar and destroy your opponents monster in the process.
STEP 2: Summon a strong monster of your choice and attack your face down morphing jar your opponent now controls. This will activate its flip effect and will destroy your hand. In this discarded hand will be the three jackpot 7 cards. When they arrive at the graveyard, they banish themselves (because morphing jar belonged to the opponent and Jackpot 7's effect states that it must be sent to the grave by your opponent's effect). Since, three Jackpot 7s are currently banished you win the duel.
ALTERNATIVES: There are other ways to use this strategy such as using cards "Dark Deal" or "Fabled Dianaira" to force your opponent to force you to discard cards. But, I feel that this strategy is less time consuming. With the perfect hand, you can win the duel in two turns.
2. Immortal of Thunder
*NOTE* There is a lot of confusion in using immortal of thunder for an OTK. Some sources state that "Immortal of Thunder" can be used with "Barrel Behind the Door" to gain life points and decrease your opponent's life points. However this doesn't work, because the effect of barrel behind the door states that any damage dealt to you will be dealt to your opponent instead. However, immortal of thunder's ability forces you to lose life points not take damage.