Shahrazad

Players must leave the game in progress
as it is and use the cards left in their libraries
as decks with which to play a subgame of Magic.
When subgame is over, players shuffle these
cards, return them to libraries, and resume game
in progress, with any loser of subgame halving his
or her remaining life points, rounding down.
Effects that prevent damage may not be used to counter this loss of life.