Taking the ridiculous idea of this very real and famous Magic: the Gathering card, Shahrazad (
http://mtg.wikia.com/wiki/Shahrazad):
Shahrazad
2 Coin
2 Victory
When you play this, randomly choose 10 from your remaining Kingdom cards, plus all the basic cards on this board to play a subgame of Dominion. If you lose, trash this.
Treasure - Victory
$4
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So basically a Harem, which you have to win a subgame to warrant another use.
Thematically, Shahrazad has to tell a good story every night to prevent herself from getting killed.