Shahrazad

• WWizards of the Coast2004-10-04
  Official Ruling
  At the start of the sub-game both players draw their initial hand (usually 7 cards). If one player has fewer cards than required, that player loses. If both have fewer than required, both players lose.
• WWizards of the Coast2004-10-04
  Official Ruling
  Events in a Shahrazad sub-game do not normally trigger abilities in the main game. And continuous effects in the main game do not carry over into the sub-game.
• WWizards of the Coast2004-10-04
  Official Ruling
  You randomly chose which player chooses to go first or draw first.
• WWizards of the Coast2007-07-15
  Official Ruling
  At the end of a subgame, each player puts all cards they own that are in the subgame into their library in the main game, then shuffles them. This includes cards in the subgame’s Exile zone.

Rulings via Scryfall

• WO
  Wizards of the Coast2013-08-05

  Shahrazad was banned in vintage on August 5, 2013. The four-of card limits and the increase in deck size helped, but it didn't stop the degeneracy, so the next step was to further limit how many of a card players could play with. Banning meant that the card was no longer allowed to be played. Source: https://magic.wizards.com/en/news/making-magic/twenty-things-were-going-kill-magic-2013-08-01