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The act of oathing a Platinum Angel into play during your upkeep with Oath of Druids, followed by the main phase casting of Diplomatic Immunity.

Magic The Gathering Card Game- Vintage 101
During his upkeep Sean put cards from his library into his graveyard until he revealed a Platinum Angel. During his main phase he announced the casting of Diplomatic Immunity. His opponent realized there wasnt much he could do and conceded the game. Sean then stated. "You have just been a victim of the Choo Choo Trolly!"
by The Jeff November 24, 2007