Illusionist's Stratagem

• WWizards of the Coast2017-02-09
  Official Ruling
  You may cast Illusionist’s Stratagem without any targets if you wish to just draw a card.
• WWizards of the Coast2017-02-09
  Official Ruling
  If each target creature is an illegal target as Illusionist’s Stratagem resolves, the spell doesn’t resolve. You won’t draw a card.
• WWizards of the Coast2017-02-09
  Official Ruling
  Each card that returns to the battlefield will be a new object with no connection to the creature that was exiled. It won’t be in combat or have any additional abilities it may have had when it was exiled. Any +1/+1 counters on it or Auras attached to it are removed, and any Equipment will no longer be attached.
• WWizards of the Coast2017-02-09
  Official Ruling
  If a creature token is exiled this way, it will cease to exist and will not return to the battlefield.
• WWizards of the Coast2017-02-09
  Official Ruling
  If you choose two target creatures and one is an illegal target as Illusionist’s Stratagem resolves, you’ll exile the other, return it, and draw a card.

Rulings via Scryfall