Archlord Kristya can be unlocked as a Single Duel opponent by defeating [[Green Baboon, Defender of the Forest (character)|Green Baboon, Defender of the Forest]] 3 times.
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===World Championship 2011===
Archlord Kristya is once again a Single Duel opponent, unlocked by defeating [[Guardian Eatos (character)|Guardian Eatos]] 3 times.
==These cards can be obtained from the [[Memory Game]] rewards in ''Over the Nexus''==after defeating Archlord Kristya.
* [[Archlord Kristya]]
* [[Valhalla, Hall of the Fallen]]
===World Championship 2010===
{{Decklist|name = No Special Summon| ja_name = 特殊召喚禁止令| romaji_name = Tokushu Shōkan Kinshirei| ja_trans_name = Special Summon Prohibition