So Tetsu Trudge plays a Six Samurai deck in the challenge mode (which I can't beat) but his deck recipe in the deck edit option is totally different. Is it possible to unlock his Six Samurai recipe?
It's a deck I've always wanted to run but know nothing about how it works. Playing this opponent really has shown me how powerful it is compared to what im currently running.
Hey, look a few posts up
http://www.neogaf.com/forum/showpost.php?p=175375119&postcount=1737
EDIT - By the way, I am surprised that few of the former top Meta decks some the AI uses in Challenge Mode.
Tetsu with Six Samurai for example, and Pegasus has a Madolche Deck.
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As for my recommended grinding deck to get cards from AI
I just use a Exodia Draw Deck
which consists of the following and the reason for using them
1x Left Arm of the Forbidden One
1x Right Arm of the Forbidden One
1x Left Leg of the Forbidden One
1x Right Left of the of the Forbidden One
1x Exodia the Forbidden One
2x Makyura the Destructor = allows traps to be used on the turn it's sent to the graveyard. Also fuel for Allure of Darkness
2x Armageddon Knight = Allows you to send a Dark Monster to the Graveyard from your Deck, For Makyura's Effect, it's a Dark Monster so Allure of Darkness Fuel
3x Sangan = Dark Monster that when sent from the field to the graveyard to grab an Exodia Piece
3x Witch of the Black Forest = Dark Monster when sent to the field to the graveyard to grab an Exodia Piece
Traps / Spells
3x Pot of Greed = draw 2 cards
3x Graceful Charity = draw 3 cards, discard 2 cards
3x Jar of Greed = draw 1 card
2x Allure of Darkness = Draw 2 Cards Banish one Dark Monster (Sangan and Witch used as fuel for this effect)
3x Good Goblin Housekeeping = Draw 1 card times number of Good Goblin Housekeeping in your graveyard, send one card back to your deck.
3x Upstart Goblin = draw 1 card, opponent gains 1000 LP
2x Dark World Dealings = Draw one card, discard one card
3x Reckless Greed = draw 2 cards skip your draw phase
3x Legacy of Yata Garasu = draw 1 card
Basically the idea is the get Makyura into the Graveyard either by the effect of Armageddon Knight, Graceful Charity, or Dark World Dealings. And just never stop drawing cards until you have your 5 Exodia Pieces and win.
In the case you don't have any draw cards, and just have Sangan or Witch in your hand, put them down in defense mode, they get destroyed, you get a free Exodia piece. Generally a duel should end on first round, second round at worst.