Curator's Ward

• WWizards of the Coast2018-04-27
  Official Ruling
  If you give hexproof to an opponent’s permanent, such as by enchanting it with Curator’s Ward, that player can still target that permanent, but you can’t.
• WWizards of the Coast2018-04-27
  Official Ruling
  A card, spell, or permanent is historic if it has the legendary supertype, the artifact card type, or the Saga subtype. Having two of those qualities doesn’t make an object more historic than another or provide an additional bonus—an object either is historic or it isn’t.
• WWizards of the Coast2018-04-27
  Official Ruling
  If Curator’s Ward is attached to a historic permanent you don’t control, you draw two cards when that permanent leaves the battlefield, not that permanent’s controller.

Rulings via Scryfall