The rarest card of all is the 1996 World Champion. This card was given out to the winner of Worlds in 1996, and all other copies of it, plus the printing plates, were ceremonially destroyed. The winner of that tournament was Australia's Tom Chanpheng, who, at last word, still has the card at his home in a screwdown plastic case.
Chanpheng won the title playing a White Weenie deck:
Creature (20)
4 Order of Leitbur 4 Order of the White Shield 2 Phyrexian War Beast 4 Savannah Lions 2 Serra Angel 4 White KnightEnchantment (1)
1 Land Tax60 Cards
Sideboard (15)
1 Kjeldoran Outpost 1 Reprisal 1 Sleight of Mind 2 Arenson's Aura 1 Black Vise 4 Divine Offering 1 Energy Storm 1 Exile 2 Serrated Arrows 1 Spirit LinkWhite (41)
4 Order of Leitbur 4 Order of the White Shield 4 Savannah Lions 2 Serra Angel 4 White Knight 1 Armageddon 1 Balance 4 Disenchant 1 Land Tax 1 Reinforcements 2 Reprisal 4 Swords to Plowshares 2 Arenson's Aura 4 Divine Offering 1 Energy Storm 1 Exile 1 Spirit LinkBlue (2)
2 Sleight of MindColorless (32)
15 Plains 4 Mishra's Factory 4 Strip Mine 2 Kjeldoran Outpost 2 Phyrexian War Beast 1 Lodestone Bauble 1 Zuran Orb 1 Black Vise 2 Serrated Arrows75 Cards
1 (14)
4 Savannah Lions 1 Land Tax 1 Reinforcements 2 Sleight of Mind 4 Swords to Plowshares 1 Black Vise 1 Spirit Link2 (24)
4 Order of Leitbur 4 Order of the White Shield 4 White Knight 1 Balance 4 Disenchant 2 Reprisal 4 Divine Offering 1 Energy Storm5 (2)
2 Serra Angel48 Cards
Common (35)
15 Plains 4 Order of Leitbur 4 Savannah Lions 4 Disenchant 1 Reinforcements 4 Divine Offering 1 Exile 2 Serrated ArrowsUncommon (22)
4 Mishra's Factory 4 Order of the White Shield 2 Phyrexian War Beast 2 Serra Angel 4 White Knight 2 Reprisal 1 Zuran Orb 2 Arenson's Aura 1 Spirit LinkRare (10)
2 Kjeldoran Outpost 1 Lodestone Bauble 2 Sleight of Mind 4 Swords to Plowshares 1 Energy Storm75 Cards
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The funny thing about Chanpheng's deck was that it contained a Sleight of Mind with no way to cast it. He misregistered his deck, forgetting the Adarkar Wastes. DCI rules forced him to fill out his empty slots with basic Plains, and so the Sleight of Mind was "stranded." It didn't matter, however, as he went on to win the Championship anyway.