The Final Face Off 1

As Yugi and Marik prepare for their duel, Kaiba arrives and 
throws to Yugi his Fiend's Sanctuary card, saying that it is 
the only way to defeat Marik. 
Marik reveals the twist of the new Shadow Game: Mai, Bakura, 
Yugi, and normal Marik are at risk. Whenever one of them loses 
lifepoints, their normal halves dissolve. Marik helps Yugi call 
forth Slifer, but has his Ra card in the graveyard. As Slifer 
attacks, Marik summons Ra to protect himself in Phoenix Mode.

By Red Eyes Fan #1